Wednesday

November 25, 2015
Number of results: 8,510

**combinatorics/probability**

Can't figure this problem out... wasn't great at the combinatorics unit, then it turns out everything carries over to probability. five couples attend a bridge party, including mr. and mrs. smith. they are randomly assigned partnership pairs. 1. probability mr. smith will have...
*February 8, 2009 by Anonymous*

**Probability/Combinatorics**

If 4 cards are drawn at random from a standard deck of cards, what are the odds, or probability, that the first three will be of the same suit and the fourth of another suit?
*July 20, 2012 by Jay*

**MATH **

JOhn had prepared the problem sets for Levels 1 to 5 of Geometry and Combinatorics for next month but forgot to label which set was for which level. Since Calvin didn't label them, the computer assigned them labels 1 through 5 randomly, with each label appearing only once. The...
*May 14, 2013 by intermediate player PLEASE HELP*

**combinatorics**

Paint the 4 faces of a regular tetrahedron by using 3 types of colors, how many possible solutions are there?
*May 24, 2015 by jay*

**combinatorics**

There are 4 kinds of colored beads( r, g, b, y) to seal onto the 6 vertices of a regular hexagon, how many solutions are there?
*May 24, 2015 by jay*

**combinatorics**

10 red, 10 blue, 10 green matches are used to build a regular icosahedron, how many possible solutions are there?
*May 24, 2015 by jay*

**statistics**

The below table shows the probabilities generated by rolling one die 50 times and noting the up face. What is the probability of getting an odd up face? roll 1 Probability 0.22 roll2 probability 0.10 roll 3 probability 0.18 roll 4 probability 0.12 roll 5 probability 0.18 roll ...
*May 3, 2012 by sc*

**math probability**

this is a probability question... Suppose you are asked to choose a whole number between 1 and 13 inclusive. (a) what is the probability that it is odd?...7/13 (b) What is the probability that it is even?...6/13 (c) what is the probability that it is a multiple of 3?...4/13 (d...
*December 18, 2008 by joe*

**Combinatorics**

In how many ways can 8 students be assigned to 2 groups if each group must have at least 3 students?
*January 17, 2011 by Anon*

**Combinatorics**

How many even integers which are between 1 and 1000 (including 1 and 1000) and relatively prime to 105?
*May 22, 2015 by Anonymous*

**Math (Combinatorics) **

How many ways to rearrange 9 a's, 2 b's, and 2c's so that we never see bc and both b's always appear before both c's?
*July 30, 2013 by andy*

**combinatorics **

1. You have k slots (of the same size) to drop n tokens into. How many ways can you do this if the tokens are marked? Unmarked? (Hint: try with 3 tokens and 7 slots first) 2. What is the probability of getting them all in the unique “winning” slot? (Do you use the marked or ...
*April 30, 2012 by Layla*

**Combinatorics**

We have two kind of tiles : 1 x 1 and 2 x 2, and use them to cover the 8 x 3 road without overlapping, how many different ways to arrange tiles there?
*May 24, 2015 by Anonymous*

**Combinatorics **

We have two kind of tiles : 1 x 1 and 2 x 2, and use them to cover the 8 x 3 road without overlapping, how many different ways to arrange tiles there?
*May 24, 2015 by jay*

**Combinatorics**

If we roll 19 identical dices together at the same time and calculate the sum of the numbers rolled, how many different possible values of the sum can we get?
*May 24, 2015 by Anonymous*

**combinatorics**

Use 3 types of colored beads to seal onto the vertices of a regular pentagon, how many possible solutions are there? Hint: The bead is a full round bead
*May 24, 2015 by jay*

**Combinatorics**

Please Help me with this question:Considering a 4*4 square grid,How many ways are there to fill each square with an integer from 1 to 10, such that the sum of each row and column is the same?The integers can be used multiple times
*October 15, 2013 by steve*

**statistics **

12. The probability that the Dow Jones stock index will close above 18000 at the end of the year is an example of (a) classical probability. (b) subjective probability. (c) independent probability. (d) priory probability. 13. The probability calculated based on observing a ...
*June 30, 2015 by meri*

**Math**

In an experiment, the probability of the event E is known to be .4. Also the probability of the event F is .8,and the probability of E∪F is 1. i) Compute the probability of these events: P(E∩F)= P(E-F)= ii) Suppose the experiment is run twice in succession. What ...
*April 21, 2011 by Tracy*

**Math (Combinatorics)**

In how many ways can I place 5 different beads on a bracelet if flipping or rotating the bracelet does not change the order of the beads?
*June 30, 2013 by Joseph*

**Math**

A spinner has numbers 1-16 on it. Probability of 6? 1/16 Probability not 6 15/16 Probability even number 8/16 Probability multiple of 3 5/16? Probability not a multiple of 3 11/16?
*November 28, 2012 by Jerald*

**Finite Math**

An urn contains sixteen red balls and seventeen white balls. A sample of three balls is selected at random and the number of red balls observed. Determine the probability distribution for this experiment: Number of Red Balls/Probability 0...Probability=? 1...Probability=? 2......
*April 5, 2012 by Amanda*

**math-probability**

The Probability that Jodi makes a basket when playing basketball is .50, Jamal’s probability is .80 and Pat’s is .75. What is the probability that all three make a basket?
*November 30, 2009 by GG*

**combinatorics**

For the 6 faces and 8 vertices of a regular hexahedron, respectively sealed with red and blue these 2 beads (each face contains a bead and each vertex contains a bead), how many different types of solutions are there?
*May 24, 2015 by jay*

**COmbinatorics**

A DNA chain is a string of As, Ts, Gs, and Cs. How many DNA chains are there of length 12 which have the following properties? Choose two of (a), (b), or (c) to submit: (a) Is a palindrome (A palindrome reads the same forwards and backwards, e.g., TAGGAT.)
*February 5, 2013 by Carlos *

**Math Probability **

If the probability that event A will happen is 1/4 and the probability of A not happening is 3/4, find the probability that event A happens 3 times out of 7 experiments
*April 16, 2012 by Antonio*

**Math - Statistics**

I roll 12 4-sided dice. What is the probability that I roll at least one 2? What is the probability that I roll exactly three 2s? So i take it, on any give roll, the probability of rolling a 2 is .25 (25%); the probability of rolling something else must be .75 The probability ...
*March 29, 2007 by Lauren*

**Probability Math **

Event A has probability of 0.2 and event B has probability of 0.3. If they are independent, what is the probability that both of them happen? I can't remember how to do this one.
*September 29, 2013 by Alex*

**Math**

10. A coin is loaded so that the probability of heads is 0.55 and the probability of tails is 0.45, Suppose the coin is tossed twice and the results of tosses are independent. a.What is the probability of obtaining exactly two heads? b.What is the probability of obtaining no ...
*March 2, 2014 by Renee*

**Probablity**

Samir had prepared the problem tests for Stages 1 to 5 of Geometry and Combinatorics for next week but forgot to label which test was for which stage. Since Samir didn't label them, the computer assigned them labels 1 through 5 randomly, with each label appearing only once. ...
*May 14, 2013 by Mathslover*

**PreCalculus **

How do you find the probability of three events happening at the same time? Please walk me through the steps. If you are in ship and get hit by lightning the probability is 1/100000. And the probability of falling down into the ocean and getting eaten by a shark is 100/100000...
*July 30, 2014 by Emma *

**statistics**

Suppose that each unit of a system is up with probability 2/3 and down with probability 1/3. Different units are independent. For each one of the systems shown below, calculate the probability that the whole system is up (that is, that there exists a path from the left end to ...
*February 17, 2014 by sam*

**math**

In a game, a player tosses a coin 4 times. If the player gets 3 or 4 heads, he/she wins. What is the theoretical probability of winning this game? I just need to know the outcomes. I don't know how to get them. Please and Thank you. Coin 1: 50% Heads Coin 2: 50% Heads Coin 3: ...
*May 30, 2007 by Angela*

**Statistics**

Event A occurs with probability 0.1 and event B with probability 0.5 A) What is the maximum probability that the intersection of A and B can have? B) What is the minimum probability that the intersection of A and B can have? C) If it is know that P(A complement and B ...
*September 6, 2014 by Rebekah*

**math-Probability**

In a certain manufacturing process the probability of a type I defect is 0.21, the probability of a type II defect is 0.31, and the probability of having both types of defects is 0.01. Find the probability of having neither type of defect.
*March 16, 2012 by Emma*

**statistics**

For any married couple who are members of a squash club, the probability that the husband has a degree is 2/4 and the probability that the wife has a degree is 1/4. The probability that the husband has a degree given that his wife has a degree is 3/9. A married couple is ...
*December 3, 2011 by Nabiha*

**12th grade**

one type of probability used everyday is: a)experienced probability b)scientific probability c)frequency of occurence d)none of the above
*December 15, 2010 by david *

**MATH combinatorics HELP!!!!!**

Determine the least positive integer n for which the following condition holds: No matter how the elements of the set of the first n positive integers, i.e. {1,2,…n}, are colored in red or blue, there are (not necessarily distinct) integers x,y,z, and w in a set of the same ...
*May 11, 2013 by Bob K.*

**business**

suppose that al knows that the probability of an investigation is 0.70 how low must the probability of water's completing its research on time be so that the probability of litres being awarded the contract is at least 0.65?
*December 24, 2012 by vinoth*

**Probability**

When I swing at a nail, I drive it all the way in with probability 1/2. With probability 1/4, I hit it half-way in, and with 1/4 probability I miss it entirely. I'm pretty sure that if I swing 4 times at a nail, I'll get it all the way in almost all the time. Let's see if I'm ...
*November 10, 2013 by Halp*

**Algebra/Probability**

Suppose that you toss a coin and roll a die. What is the probability of obtaining tails or a six? (Enter the probability as a fraction.) I came up with 1/6 which does not sound right thank you for you time on this Holiday
*May 26, 2014 by Mary Ann *

**probability and statistics I NEED HELP**

The MSU basketball team is playing OU. If the probability that MSU wins the game is 0.68 and the probability that OU wins is 0.27. 1. Find the probability that MSU or OU wins. 2. Find the Probability that there is a tie.
*May 11, 2011 by Emily*

**probability-April**

The probability that a student passes Mathematics is 2/3 and the probability that he passes English is 4/9. If the probability that he will pass at least one subject is 4/5, then what is the probability that he will pass (i) Both the subjects? (ii) Exactly one of the subjects...
*April 18, 2013 by Anonymous*

**Math-Probability**

Hello, I'm trying to figure out this probability problem. Can anyone help walk me through? Thank you so much!! A box contains 10 green, 2 red, 7 yellow, and 6 blue marbles. Four marbles are drawn from the box without replacement. a) What is the probability that all four ...
*August 7, 2009 by Marie*

**probability **

Anne and Bob each have a deck of playing cards. Each flips over a randomly selected card. Assume that all pairs of cards are equally likely to be drawn. Determine the following probabilities: (1) The probability that at least one card is an ace, (2) the probability that the ...
*September 7, 2015 by matt*

**Statistics**

An investor is considering an investment in a start-up company. she estimates that she has probability 0.25 of a $ 39,739 loss, probability 0.20 of a $ 19,759 profit, probability 0.15 of a $ 49,068 profit, and probability 0.40 of breaking even (a profit of $0). What is the ...
*October 1, 2015 by Obi*

**probability**

Suppose the probability of surviving for 5 years after being diagnosed with a particular cancer is 0.60; and the probability of surviving 10 years is 0.20. If a person survives 5 years, what is the probability that she will survive 10 years.
*July 13, 2014 by Anonymous*

**Combinatorics**

Bob is at an amusement park with 10 different rides. He only has time to go on 3 rides, before he needs to head back for his curfew. If he only wants to go on each ride a maximum of one time, how many different ways are there to go on 3 rides?
*March 19, 2013 by Bob*

**statistics**

Let a random variable be distributed as shown below X=x : 0,1,2,3,4,5,6 P(x): .1 .09 .2 .15 .16 .2 (a) Find the probability p(6) (b) Find the probability P(3< X < 5) (c) Find the probability P(X < 4) (d) Find the probability P(X > 2)
*September 17, 2011 by kim wallace*

**Probability**

A loaded die has the property that the probability of throwing an odd number is three time the probability of throwing an even number. If the even number are equally likely to appear, find the probability of rolling either a 3 or a 6.
*June 10, 2013 by A loaded die*

**probability**

A stock market analyst figures the probabilities that two related stocks, A and B, will go up in price. She finds the probability that A will go up to be 0.6 and the probability that both stocks will go up to be 0.4 What should be her estimate of the probability that stock B ...
*July 7, 2013 by sarah*

**Determining Probabilities**

When would you expect the experimental probability of an event to be closest to its theoretical probability? When the results of 10 trials were used in calculating the theoretical probability When the results of 10 trials were used in calculating the experimental probability ...
*February 18, 2014 by Jamar*

**ap statistics**

In hypothesis testing, β is the probability of committing an error of Type II. The power of the test, 1 - β, is then: A. the probability of failing to reject H0. B. the probability of rejecting H0 when HA is true C. the probability of failing to reject H0 when H0 is ...
*April 24, 2014 by emma*

**Math**

Margo and Carrie are trying to go to Idaho for Dawn's wedding. The probability of finding a flight for less than $400 is 1/7. The probability of Carrie making enough money babysitting to pay for her flight is 3/5. The probability of the girls being able to take time off from ...
*June 30, 2015 by Anonymous*

**probability and statistics**

The MSU basketball team is playing OU. If the probability that MSU wins the game is 0.68 and the probability that OU wins is 0.27. 1. Find the probability that MSU or OU wins. 2. Find the Probability that there is a tie.
*May 11, 2011 by Emily*

**Math (Combinatorics)**

How many 4 digit positive integers have the ones digit a multiple of 1, the tens digit a multiple of 2, the hundreds digit a multiple of 3 and the thousands digit a multiple of 4?
*April 29, 2013 by Bob*

**Economics/Math**

1. Assume that q and z are two random variables that are perfectly positively correlated. q takes the value of 20 with probability 0.5 and the value of zero with probability 0.5, while z takes the value of 10 with probability 0.5 and the value of zero with probability 0.5. ...
*December 5, 2009 by Susan*

**math**

The Probability that Jodi makes a basket when playing basketball is .50, Jamal’s probability is .80 and Pat’s is .75. What is the probability that all three make a basket?
*November 18, 2009 by Kylie Castaneda*

**math**

The Probability that Jodi makes a basket when playing basketball is .50, Jamal’s probability is .80 and Pat’s is .75. What is the probability that all three make a basket?
*November 18, 2009 by CLA*

**Math - Probability**

A developer can buy a piece of property that will produce a profit of $16,000 with probability .7, or a loss of $9000 with probability .3. What is the expected profit?
*December 7, 2009 by Stephanie*

**statistics **

15. The probability that a recently offered stock by a technology company will double in value within the next three months is 90%. The conclusion regarding this probability estimate was reached based on the opinion of the experts in the technology field to which this stock ...
*June 30, 2015 by meri*

**probability maths**

Jim rolls a dice twice. The dice is biased so the probability of getting a six is one quarter. WHat is the probability that he gets two sixes
*January 30, 2010 by Latika*

**Math 221 Week3**

A probability experiment consists of rolling a 6 sided die. Find the probability of the event below: rolling a number less than 3? The probability is
*September 15, 2014 by Carolyn*

**math ,correction**

Is this correct? consider determining how many possible phone numbers are in an area code (repeated numbers allowed) Is this a combination, a permutation, or neither? I think it would be a combination wouldn't it? Since there are ten number possibilities in each of the three ...
*July 13, 2007 by student*

**probability**

hi! how would you figure out a problem where you are given a probability of success for 12 people and you are trying to find the probability of success for 1 person?
*December 8, 2009 by ali*

**Probability & Statistics**

A basketball player shoots free throws and makes them with probability 1/3. What is the probability the player will miss three in a row?
*July 29, 2010 by anonymous*

**probability**

The probability that patient recovers from a delicate heart operation is 0.9. What is the probability that exactly 5 of the next 7 patients having this operation survive?
*August 30, 2010 by jim*

**statistics**

1)Let X have a normal distribution with mean 6 and standard deviation 3. a) What is the probability that X > 8.7 2)What is the probability that X<0? 3)What is the probability that |X-6| > 1.9 ? I have got so far: P(Z > 0.9) but I do not know where to go from here! ...
*October 7, 2012 by rachel*

**statistics - probability**

A total of 16 mice are sent down a maze, one by one. From previous experience, it is believed that the probability a mouse turns right is .38 a) What is the probability that 8 or fewer turn right? b) What is the probability that 8 or more turn right? c) What is the probability...
*October 12, 2012 by andy*

**Statistics**

Assume that a procedure yields a binomial distribution with n=3 trials and a probability of success of p= 0.90. Use a binomial probability table to find the probability that the number of successes x is exactly 1.
*December 2, 2014 by Angel*

**Combinatorics**

Calvin has 3 red juggling pins, 4 blue juggling pins, 5 white juggling pins, and 6 green juggling pins. How many ways can he give a set of 3 juggling pins to Dan?
*September 29, 2013 by John*

**maths-probability**

A family has four children. The probability of having a girl is 1/2. What is the probability of having 2 girls followed by 2 boys?
*April 16, 2008 by louis*

**Statistics **

The probability distribution of number of calls coming to a call center every 15 minute period is shown below. x 5 6 7 8 9 10 11 12 13 p ( x ) 0.02 0.04 0.07 0.08 0.09 0.11 0.12 0.13 0.10 Continued… x 14 15 16 17 18 19 20 p ( x ) 0.07 0.06 0.04 0.03 0.02 0.01 0.01 1. This ...
*July 6, 2015 by meri*

**math**

A bag contains 5 red marbles, 6 white marbles, and 8 blue marbles. You draw 5 marbles out at random, without replacement. What is the probability that all the marbles are red? The probability that all the marbles are red is? What is the probability that exactly two of the ...
*November 8, 2015 by vicke*

**Math**

A bag contains 9 red marbles, 8 white marbles, and 6 blue marbles. You draw 4 marbles out at random, without replacement. What is the probability that all the marbles are red? 1 The probability that all the marbles are red is...? 2 What is the probability that exactly two of ...
*November 10, 2015 by Chris*

**statistics**

The power of a significance test for a particular value of the parameter is computed to be 0.93. Which statement below is true? a) The probability of committing a Type I error is 0.07. b) The probability of committing a Type I error is 0.93. c) The probability of committing a ...
*April 17, 2012 by Anna*

**probability**

John has 3 unique coins such that the probability of obtaining a head when the coin is flipped is 1/10, 2/10 and 3/10, respectively. If he flips each of the 3 coins once, the probability that at least 1 heads appears is p. What is the value of 1000p?
*February 10, 2013 by john*

**Probability**

If you pick a card at random from a well shuffled deck, what is the probability that you get a face card or a spade? a) 3/26 is that correct In one town, 336% of all voters are Democrats. If two voters are randomly selected for a survey find the probability that they are both ...
*December 4, 2006 by David*

**math**

Suppose the probability that a construction company will be awarded certain contract is .25, the probability that it will be awarded a second contract is .21, and the probability that it will get both contracts is .13. What is the probability that the company will win at least...
*October 19, 2007 by crissy*

**stat**

Three coins are tossed, and the number of heads observed is recorded. (Give your answers as fractions.) (a) Find the probability for 0 heads. (b) Find the probability for 1 head. (c) Find the probability for 2 heads. (d) Find the probability for 3 heads.
*July 6, 2012 by jilla*

**Statistics**

A total of 16 mice are sent down a maze, one by one. From previous experience, it is believed that the probability a mouse turns right is .38 a) What is the probability that exactly 8 of these 16 mice turn right? b) What is the probability that 8 or fewer turn right? c) What ...
*October 12, 2012 by please help*

**probability. review questions**

1)what is the probability that a seven-digit phone number has one or more repeated digits? 2) five letters, with repetition allowed, are selected from the alphabet. what is the probability that none is repeated?
*July 28, 2010 by sha*

**Probability **

A nickel is flipped and a dime is flipped. 1. What is the probability of obtaining exactly one head? A bag contains five balls numbered 0 through 4. Two balls are chosen at random in succession. The first ball is replaced before the second is chosen. 1. What is the probability...
*February 7, 2013 by Kyle*

**math-probability**

A student claims that if a fair coin is tossed and comes up heads 5 times in a row, then, according to the law of averages, the probability of tails on the next toss is greater than the probability of heads. What is your reply?
*April 19, 2010 by jennifer*

**Statistics**

If red has a probability of occurrence of .70 and black has a probability of occurrence of .30 and they are the only choices what is the probability that you pick the right color 10 out of 10 times and what is the standard deviation. I keep getting (.70*.50) + (.30*.50) = .50...
*February 11, 2012 by Joe D.*

**Math: Probability**

I need help. Here's the queston. Julia has 3 red marbles, 4 blues,3 yellow and 6 black in a bag. She takes one out at random. The probability its black ___ The probability its yellow ___ The probability it isnt red ___
*February 28, 2009 by Mark*

**Probability **

Suppose that an unfair coin comes up heads 54.1% of the time. The coin is flipped a total of 13 times. a) What is the probability that you get exactly 6 heads? b) What is the probability that you get exactly 6 tails? c) What is the probability that you get at most 9 tails?
*February 24, 2012 by Vikki*

**Probability**

You have a sample space of 2 events called A and B. From your experimental observations you determine the probability of A or B {i.e. P(A or B)} to be 71%. You also conclusively determine that the probability of A is 30% and the joint probability of both events occurring is 19...
*June 30, 2012 by DLCS*

**Math (Combinatorics)**

Six boxes labeled 1,2,…,6 are arranged in a line. Seven identical balls are to be placed into the boxes such that for any 1 ≤ k ≤ 6, there are at least k total balls amongst boxes 1,2,…k. How many different placements of the balls into the boxes are possible?
*May 21, 2013 by Dan*

**math**

Carolyn tested a coin to see if it was evenly weighted. She flipped the coin 100 times and came up with 42 heads and 58 tails. How does the relative frequency of tails to heads compare to the probability of tails in this experiment? A. The relative frequency is the same as the...
*June 8, 2013 by bubbie*

**math (probability)**

The probability that it will be rainy on Monday is 7/10. The probability that it will be windy on Monday is 6/10. These events are independent. What is the probability that it will be rainy or windy on Monday?: * a.21/50 b.29/50 c.22/25 d.3/25 Please respond to the question ...
*September 22, 2007 by --*

**probability**

Two six-sided dice each have the numbers 1 through 6 on their faces. Neither die is fair, but they are both weighted the same. The probability of rolling a certain number on one die is given in the table below: # 1 2 3 4 5 6 probability 1/6 1/6 1/9 ? 2/9 ? If the probability ...
*March 8, 2013 by Anonymous*

**probability**

John has 3 unique coins such that the probability of obtaining a head when the coin is flipped is 110, 210 and 310, respectively. If he flips each of the 3 coins once, the probability that at least 1 heads appears is p. What is the value of 1000p?
*February 10, 2013 by john*

**Genetics**

Phenylketonuria, a Metabolic disease in humans, is caused by a recessive allele, k. If two heterozygotes marry and plan a family of six children: a)what is the probability that all will be unaffected? b)what is the probability that three will be unaffected and three will be ...
*September 2, 2011 by Tommy*

**Economics/Statistics**

1. Assume that q and z are two random variables that are perfectly positively correlated. q takes the value of 20 with probability 0.5 and the value of zero with probability 0.5, while z takes the value of 10 with probability 0.5 and the value of zero with probability 0.5. ...
*December 6, 2009 by Susan*

**statistics**

Assume a binomial probability distribution has p = .60 and n = 200. a)What are the mean and standard deviation (to 2 decimals)? b)Why can the normal probability distribution be used to approximate this binomial distribution? c)What is the probability of 100 to 110 successes (...
*April 5, 2014 by Vanessa*

**Probability**

7. The random variable X is distributed normally with a mean of 12.46 and variance of 13.11. You collect a random sample of size 37. a. What is the probability that your sample mean is between 12 and 13? b. What is the probability that a single observation is between 12 and 13...
*October 27, 2013 by John*

**Math-Probability**

Consider a collection of biased coins, each showing Heads with probability and Tails with probability , independently of the others. The coins are tossed and all coins showing Heads are collected together and tossed again. Write down an expression for the probability mass ...
*January 22, 2012 by sand*

**Math-Probability**

Consider a collection of n biased coins, each showing Heads with probability p and Tails with probability 1-p , independently of the others. The coins are tossed and all coins showing Heads are collected together and tossed again. Write down an expression for the probability ...
*January 22, 2012 by sand*

**Math-Probability**

Consider a collection of n biased coins, each showing Heads with probability p and Tails with probability 1-p , independently of the others. The coins are tossed and all coins showing Heads are collected together and tossed again. Write down an expression for the probability ...
*January 24, 2012 by sand*