Wednesday

April 16, 2014

April 16, 2014

Number of results: 10,201

**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...
*Sunday, February 8, 2009 at 4:10pm 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?
*Friday, July 20, 2012 at 1:36am by Jay*

**probability and statistics**

Sorry, my computer was on the blink, and I am catching up! Here are my comments. If the line segment is "commensurable" in Euclid's terms, i.e. the original length is an integer in modern terms, then it is possible to calculate the probability. The problem is one of ...
*Tuesday, October 4, 2011 at 9:25am by MathMate*

**Probability/Combinatorics**

First card: any card (52/52) Second card: one of 12 remaining cards of the same suit (12/51) third card: one of 11 remaining cards of the same suit (11/50) fourth card: one of 39 cards of any other suit (39/49) Since all these are required events, use the multiplication rule ...
*Friday, July 20, 2012 at 1:36am by MathMate*

**MATH ELE.**

Check this helpful site. http://www.mathsisfun.com/combinatorics/combinations-permutations.html
*Tuesday, August 11, 2009 at 2:03pm by Ms. Sue*

**Math**

http://www.mathsisfun.com/combinatorics/combinations-permutations.html
*Tuesday, November 10, 2009 at 10:44am by Ms. Sue*

**Combinatorics**

C(4,1) C(5, 1) C(6, 1) = (4!/1!3!) (5!/1!4!) (6!/1!5!) = ...
*Thursday, September 26, 2013 at 1:39am by Graham*

**Combinatorics**

20
*Monday, October 21, 2013 at 4:44am by Anonymous*

**combinatorics/probability**

Hmmmm. Randomly assigned parteners? Does that mean Mr Smith can get Mr Jones as a partner? The problem says randomly, so I assume same gender couples are ok. 1. (1/9) if same gender couples are ok. 2) (1/9)(1/7)(1/5)(1/3) check that thinking. Now, if same gender are not ...
*Sunday, February 8, 2009 at 4:10pm by bobpursley*

**geometry and combinatorics**

297
*Tuesday, April 30, 2013 at 2:43am by Anonymous*

**Math (Combinatorics)**

262144
*Wednesday, May 1, 2013 at 6:41am by Anonymous*

**Math (Combinatorics)**

16
*Wednesday, June 26, 2013 at 9:23am by lin*

**Math (Combinatorics)**

Awesome, thanks!
*Sunday, June 30, 2013 at 1:20pm by Joseph*

**Combinatorics**

I am not sure how to solve that?
*Sunday, September 29, 2013 at 5:05pm by John*

**Math (Combinatorics)**

(2)(4)(5)(10)=400
*Monday, April 29, 2013 at 11:35am by Steve*

**Math (Combinatorics)**

Thanks ravi and ashu :)
*Monday, April 29, 2013 at 11:37am by Bob*

**Math (Combinatorics)**

400
*Monday, April 29, 2013 at 11:35am by Anirudh Mahapatro*

**Probability**

I will let a = 1/175,711,536= 5.591145*10^-9 , to save typing. The expected number, among 200,000,000, is L = 2*10^8 a = 1.13823 The probability of P(k) of k winners is given by Poisson statistics: P(k) = L^k*e^-L/k! Probability of 0 winners = 0.32039 Probability of 1 winner...
*Tuesday, March 18, 2008 at 4:38am by drwls*

**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...
*Tuesday, May 14, 2013 at 4:09am by intermediate player PLEASE HELP*

**Math (Combinatorics)**

121 say thanks....to Us...
*Monday, April 29, 2013 at 11:37am by Ravi ANd Ashu*

**statistics/probability**

1. The probability that a student passes mathematics is 2/3 and the probability that he passes biology is 4/9. If the probability of passing one course is 4/5, what is the probability that he will pass both courses?
*Saturday, October 23, 2010 at 5:30pm by Anonymous*

**Maths**

The question is an exact copy from the springer book on 'Combinatorics'.
*Thursday, April 18, 2013 at 10:38am by BrilliantLover*

**geometry and combinatorics**

297 is correct. how did you come up with that answer?
*Tuesday, April 30, 2013 at 2:43am by sanji*

**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 ...
*Thursday, May 3, 2012 at 8:05pm by sc*

**Math (Combinatorics)**

looks to me like just 13*15 possible gate id's.
*Wednesday, April 3, 2013 at 11:20am by Steve*

**Combinatorics**

18! / 3!4!5!6!*3! The question should be about the number of ways he can choose 3 pins. Who knows how he gives them away?
*Sunday, September 29, 2013 at 5:05pm by Steve*

**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...
*Thursday, December 18, 2008 at 12:22am by joe*

**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 ...
*Thursday, April 21, 2011 at 6:55pm by Tracy*

**statistics**

if n units are independent and the probability of each being up is 2/3 then the probability of all n being up is (2/3)^n HOWEVER I can not see your flow chart and therefore can not evaluate parallel paths if there are two ways to get from A to B and the probability of failure ...
*Monday, February 17, 2014 at 8:34pm by Damon*

**Maths**

In any order ,I guess, as it hasn't been particularly specified!The question is an exact copy from the springer book on 'Combinatorics'.
*Thursday, April 18, 2013 at 10:38am by Mathsfreak*

**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......
*Thursday, April 5, 2012 at 12:28am by Amanda*

**math**

This site shows an example of a Venn diagram. http://www.combinatorics.org/Surveys/ds5/VennWhatEJC.html Label each of the three circles: Love, Prison, Trucks. 12 songs were about a truck driver who is in love while in prison Place this one in the part where all three circles ...
*Sunday, October 4, 2009 at 7:24pm by Ms. Sue*

**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?
*Monday, November 30, 2009 at 6:55pm by GG*

**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
*Monday, April 16, 2012 at 2:03pm by Antonio*

**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 ...
*Monday, April 30, 2012 at 7:54pm by Layla*

**algebra 2**

What you are being asked is what is the probability of getting 3 and 5 or two 4s on the next roll. On the second problem, the probability of getting a 3 is 1/6 and "anything else" is 1. With the information below, you should be able to calculate the probability of a pair of 3s...
*Tuesday, March 10, 2009 at 9:40am by PsyDAG*

**Math**

The probability of a head on each toss = .5 or 1/2. The probability of getting a 4 is 1/6. The probability of all the events occurring is found by multiplying the probability of the individual events — 2 coin tosses and one roll of the die. I hope this helps. Thanks for asking.
*Wednesday, June 17, 2009 at 8:33pm by PsyDAG*

**probability**

ok but how do i find the final probability? i see how i can get the probability of a certain combination, but i don't understand how i can find that end probability.
*Sunday, February 28, 2010 at 1:55pm by Ryan!*

**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.
*Sunday, September 29, 2013 at 4:48am by Alex*

**Combinatorics**

In how many ways can 8 students be assigned to 2 groups if each group must have at least 3 students?
*Monday, January 17, 2011 at 7:40am by Anon*

**math**

However, the probability of getting 5 (or any other number 1-6) on a die is 1/6. The either-or probability is found by adding the probability of individual events. The sum of both dice = 5 can be obtained by 1, 4 4, 1 2, 3 or 3, 2 The probability of getting any one of these ...
*Saturday, April 25, 2009 at 9:28pm by PsyDAG*

**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.
*Friday, March 16, 2012 at 11:59pm by Emma*

**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 ...
*Sunday, March 2, 2014 at 3:45pm by Renee*

**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?
*Tuesday, July 30, 2013 at 2:08pm by andy*

**probability**

One chip drawn would have to be 5 and that probability is 1/8. The probability that a second drawn chip is not larger than 5 is 4/7. The probability of the third chip not being larger than 5 is 3/6, or 1/2. This is true regardless of the order they are drawn. Total probability...
*Friday, June 24, 2011 at 6:15pm by drwls*

**math**

a. probability=numberwaysright/total number ways=1/6 b. there are the following odd numbers: 1,3,5. There are six possible numbers probability=3/6=1/2 c. Less than five means not 5, or 6 probability=1-2/6 d. no greater than three means 1,2, or 3 probability=3ways/6possible=1/2
*Thursday, May 30, 2013 at 11:13pm by bobpursley*

**Intro to Probability**

For firm 1 Probability of getting contract a only = probability of getting a - probability of getting both = 1/3 - 1/9 = 2/9 Probability of getting contract b only = 2/9 Probability of getting a and b both = 1/9 so E($) = (4/9)90 k + (1/9) 180 k = 40 + 20 = $60 K
*Saturday, February 23, 2008 at 7:14pm by Damon*

**Combinatorics**

If they have n>=2k monsters to choose from, then we need C(n,2) + C(n,3) + C(n,4) + ... + C(n,k) >= 500,000 10 ∑ C(20,k) = 616,665 k=1
*Monday, October 21, 2013 at 4:44am by Steve*

**Maths**

Mind ur language,geezer.What on this earth is Brilliant anyways.Please check out 'The 1001 combinatorics problems' by 'Springer' problem #79 before blaming me..........:p
*Thursday, April 18, 2013 at 10:38am by Mathsfreak*

**discrete probability distribution (help please!)**

Add the probabilities that 0, 1, 2 or 3 components have failed. That sum will be the probability that the machine works. The probability that none have failed is P(0) = 0.8^7 = 0.210 The probability that one part has failed is P(1) = 0.8^6*0.2*7 = 0.367 The probability that ...
*Monday, April 12, 2010 at 9:52pm by drwls*

**Statistical Methods**

To get the probability that all events would occur, you need to multiply the probability of each of the individual events. The probablitiy of no rainy days is .8^15. The probability of one rainy day is .2 * .8^14. The probability of two rainy days is .2^2 * .8^13. The ...
*Tuesday, March 11, 2008 at 11:31pm by PsyDAG*

**Math**

3 and 6 are multiples of 3. The probability the either one or the other events would occur is obtained by adding the probability of the individual events. Probability = 1/6 + 1/6 = 2/6 = 1/3 2, 4 and 6 are even numbers = 1/6 + 1/6 + 1/6 = 3/6 = 1/2 The probability that both/...
*Saturday, June 13, 2009 at 12:20pm by PsyDAG*

**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 ...
*Saturday, December 3, 2011 at 8:23pm by Nabiha*

**Probability **

On a single toss of a pair of dice, the probability of getting a seven are 1/6. For three consecutive tosses of 7, the probability is (1/6)^3 = 1/216
*Sunday, February 20, 2011 at 11:11pm by drwls*

**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?
*Wednesday, November 28, 2012 at 6:07pm by Jerald*

**math**

probability of one 5 = 4/52 probability of two 5s = 4/52*3/51 probability of three 5s =4/52*3/51*2/50 probability of four 5s=4/52*3/51*2/50*1/49 so probability of at least one 5 = sum of all those subtract that from 1 to get the probability of none.
*Thursday, July 29, 2010 at 12:24am by Damon*

**probability**

Another way to compute this is by counting the number of ways you can make the three numbers diffrent. If you choose X first, then you have 6 choices for X. If Y is next then there are 5 choices for Y lft and 4 for Z. So, there are 6*5*4 possibilities. The probablity of any ...
*Tuesday, November 20, 2007 at 2:36am by Count Iblis*

**COLLEGE MATH**

The probability of picking the first number correctly is 1/56, since zero is included. Since the numbers are not replaced, the probability of the second is 1/55, the third, 1/54 and so on. The probability of all events occurring is obtained by multiplying the individual ...
*Wednesday, April 22, 2009 at 8:18pm by PsyDAG*

**12th grade**

one type of probability used everyday is: a)experienced probability b)scientific probability c)frequency of occurence d)none of the above
*Wednesday, December 15, 2010 at 9:20pm by david *

**probability**

The probability that a bus will arrive late at the civic center is. 35, and the probability that it will be on time or early in. 60. Explain why the statement is incorrect.
*Sunday, December 12, 2010 at 11:04am by Sherice*

**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...
*Thursday, April 18, 2013 at 10:08am by Anonymous*

**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 ...
*Sunday, November 10, 2013 at 1:43pm by Halp*

**PROBABILITY**

This is the probability of selecting one lucky and two unlucky tickets. The probability of all events occurring is found by multiplying the individual probabilities. 3/10 * 7/9 * 6/8 = ?
*Wednesday, October 20, 2010 at 2:57pm by PsyDAG*

**math**

Each letter has a probability of 1/26 and the numeral has a 1/10 probability. Multiply the eight probabilities and the denominator of the product will be you answer for a. The probability for "math4you" is the above product. The probability for "math" = (1/26)^4. I hope this ...
*Tuesday, February 26, 2008 at 4:03pm by PsyDAG*

**statistics**

The probability of drawing an Ace is 4/52, while the probability of drawing some other card is 48/52. The probability of all events occurring is found by multiplying the probability of the individual events. I hope this helps.
*Tuesday, January 26, 2010 at 7:02pm by PsyDAG*

**Dice Probability**

No. The probability of the first die rolling a 2 is 1/6. The probability of the second die rolling a 3 is 1/6. The combined probability is 1/36.
*Monday, September 30, 2013 at 9:35am by Graham*

**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?
*Sunday, June 30, 2013 at 1:20pm by Joseph*

**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
*Tuesday, October 15, 2013 at 10:32am by steve*

**math-binomial prob**

Use the binomial theorem to get the possibility of 0,1,2,3,4 and 5 correct. For zero correct, the probability is just (3/4)^5 = 0.2373. 3/4 is the probability of getting each one wrong. For five correct, the probability is (1/4)^5 = 0.0001 For one correct, (one success and 4 ...
*Friday, December 14, 2007 at 12:44pm by drwls*

**algebra**

a basketball player shoots 70% of freethrows he has a 1 an 1 what is the probability of him shooting o,1,2 points * algebra - bobpursley, Sunday, January 2, 2011 at 12:41pm Pr(0)=.3 Pr(1)= .7*.3 pr(2)=.7*.7 ---------------------------------- * means times, multiply probability...
*Sunday, January 2, 2011 at 2:47pm by Damon*

**PROBABILITY**

The probability ofdrawing just one club in the 52 draws = 1/4 * (3/4)^51 The probability of drawing two clubs — which fits the "at least" description — in 52 draws = (1/4)^2 * (3/4)^50 The probability of drawing three clubs in 52 draws = (1/4)^3 * (3/4)^49 Or you could go from...
*Thursday, April 17, 2008 at 11:24pm by PsyDAG*

**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 ...
*Friday, August 7, 2009 at 2:42pm by Marie*

**Combinatorics**

wow. Since only one of each can be chosen, we have 4*5*6 ways to select the 3 items. Graham's solution is generalizable for situations where several of each item may be chosen, but seems like overkill in this case.
*Thursday, September 26, 2013 at 1:39am by Steve*

**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?
*Monday, December 24, 2012 at 7:40am by vinoth*

**MATH**

IF THE PROBABILITY OF A IS 3/5.AND PROBABILITY OF A INTERSECTION B IS 3/10.WHAT IS THE PROBABILITY OF B?
*Saturday, December 15, 2012 at 4:51pm by Anonymous*

**statistics**

odd numbers = 1, 3, 5, 7, 9 even numbers = 2, 4, 6, 8 you are looking for the probability of getting 1, 2, or 3 balls with odd numbers. 5/9*4/8*3/7 = probability of selecting one odd number 5/9*4/8*4/7 = probability of selecting two odd numbers 5/9*4/8*3/7 = probability of ...
*Monday, September 13, 2010 at 10:25pm by PsyDAG*

**statistics**

odd numbers = 1, 3, 5, 7, 9 even numbers = 2, 4, 6, 8 you are looking for the probability of getting 1, 2, or 3 balls with odd numbers. 5/9*4/8*3/7 = probability of selecting one odd number 5/9*4/8*4/7 = probability of selecting two odd numbers 5/9*4/8*3/7 = probability of ...
*Monday, September 13, 2010 at 10:25pm by PsyDAG*

**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...
*Friday, October 12, 2012 at 2:01pm by andy*

**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.
*Wednesday, May 11, 2011 at 9:17pm by Emily*

**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)
*Saturday, September 17, 2011 at 11:01am by kim wallace*

**probability**

well you can understand it like, for one qusetion getting right, the probability is=.5 as there are only two options true and false. for two qusetion getting right, the probability is=.5*.5 for three qusetion getting right, the probability is=.5*.5*.5...
*Wednesday, March 6, 2013 at 6:42am by saiko*

**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 ...
*Tuesday, February 18, 2014 at 1:42pm by Jamar*

**probability**

To get one red out of the seven, you have 4 chances, so the probability is 4/7. Since the chips will be replaced, the second and subsequent draws will be under the same conditions, i.e. they are independent. The probability of each subsequent draw is again 4/7. The probability...
*Tuesday, October 6, 2009 at 11:57am by MathMate*

**statistics**

The answer to part a) is 1/2 As for the others, I have never heard of "personal probability" There are two kinds of probability: 1. Empirical Probability which is based on the results of experiments to collect data about an event 2. Mathematical Probability base on the ...
*Sunday, March 9, 2008 at 8:54pm by Reiny*

**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...
*Friday, October 19, 2007 at 9:07pm by crissy*

**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.
*Wednesday, May 11, 2011 at 7:16pm by Emily*

**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?
*Thursday, July 29, 2010 at 5:50pm 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?
*Monday, August 30, 2010 at 7:57pm by jim*

**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?
*Tuesday, December 8, 2009 at 2:29pm by ali*

**probability**

Each person has a 1/3 probability of making the choice from 3. The probability of both/all events occurring is determined by multiplying the probabilities of the individual events.
*Tuesday, November 20, 2012 at 11:23am by PsyDAG*

**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?
*Friday, February 24, 2012 at 12:06am by Vikki*

**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?
*Monday, December 7, 2009 at 3:07pm by Stephanie*

**probability**

The probability that a student passes Biology is 0.35 and the probability to pass Chemistry is 0.63. If the probability to pass both Biology and Chemistry is 0.4, what is the probability that he will pass either Biology or Chemistry?
*Wednesday, February 15, 2012 at 8:43am by Anonymous*

**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?
*Wednesday, April 16, 2008 at 9:26am by louis*

**Statistics**

A. Probability of 0 or 1 job offer. B. Probability of 2 or 3 job offers. To find either-or probability, add the individual probabilities.
*Wednesday, May 19, 2010 at 9:48pm by PsyDAG*

**Maths**

Wow, this goes back quite some time. by definition C(n,r) = n!/(r!(n-r)!) , so C(7,3) = 7!/(3!4!) = 35 , and C(7,4) = 7!/(4!3!) Most scientific calculators contain the functions C(n,r) and P(n,r) they are probably written as nCr and nPr Here is a page that explains the ...
*Thursday, August 27, 2009 at 6:34am by Reiny*

**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 ...
*Monday, February 17, 2014 at 8:34pm by sam*

**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
*Saturday, January 30, 2010 at 4:51am by Latika*

**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. ...
*Saturday, December 5, 2009 at 6:39am by Susan*

**Statistics**

Find P(0), then take 1 - P(0) for your probability (since the problem says "what is the probability that at least one" is defective). Using the binomial probability function (you can use a binomial probability table as well): P(x) = (nCx)(p^x)[q^(n-x)] n = 4 x = 0 p = 17/53...
*Sunday, September 9, 2007 at 9:58pm by MathGuru*

Pages: **1** | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | Next>>