Friday

August 26, 2016
Number of results: 120,779

**math**

the probabilities that 3 friends A,B andC pass a driving test are1/3,1/4,2/5 respectively.All 3 take the test find the probability that(a)aa 3 failed the test (b) only B passes the test(c) only 2 of them pass the test (d)at least 1 passes the test... I will do one. Assuming ...
*June 26, 2007 by celina*

**Math**

How do I work this math prob. I always have a B and would like to bring it up. Caan you PLEASE help me with this prob. on unit rates "$2 for 5 cans of tomato soup"
*January 10, 2011 by Sarah*

**stats**

a test consists of 25 multiple choice questions. Each has 5 possible answers, which only one is correct. If a student guesses on each question, find the following: a) prob that he will guess all of them right b)prob that he will guess at most 12 right c) prob that he will ...
*February 18, 2011 by gio*

**math- algebra- help please!**

3 dice are rolled let (y,r,b) represent each outcome? a- sample space b- prob rolling a sum of 18 c- prob of rolling a sum less than 5
*April 6, 2011 by Zach*

**statistics**

Use the normal dist to approx the desired prob. Find the prob of getting at most 30 fives in 200 tosses of a fair 6 sided die
*October 4, 2013 by Sandra*

**Statistics**

How do I plug this into the Binomial Probability Formula? prob(lost) = 5/1000 = 1/200 prob(not lost) = 199/200 prob( 2 of 22 are lost) = C(22,2) (1/200)^2 (199/200)^20 = .005224..
*March 9, 2014 by Brenda*

**Linear algebra**

In a medical prognosis model, there are three states for a person: well, ill and dead. We are given that the prob. one states well given that the person is well is 0.3. The prob. one becomes ill given that one is well is 0.5. The prob. one states ill given that one is ill is 0...
*December 7, 2015 by Lucie*

**algebra**

Prob.1: -14=2x+2x-2 Prob.2: 5x=50
*May 29, 2013 by cheyenne*

**Statistics**

DIAGRAMS MUST BE DRAWN Given the standard normal distribution, determine:Prob Z greater than 1.50 Prob Z between1.06 and 1.96 Given the standard normal distribution determine the Z values that contain 80% in the middle of the curve.
*March 2, 2013 by Sue*

**math**

dale placed six cARDS IN A BAG.QONE CARD IS LABELD 1,TWO CARDS ARE LABELD2,AND RTHREE CARDS ARE LABELD 3.FIND THE PROBABILITY OOF PICKING TWO CARDS IN THE ORDER OF THE NUBERS LISTED TH EFIRST CARD IS RETURNED BEFORE THE SECOND IS PICKED ..... P,(1,2) P(3,NOT1) p(NOT2,2) P(1,3...
*May 22, 2007 by sam*

**Probability and Statistics (Continuation)**

Assume 10% of the engines manufactured on an assembly line are defective. If engines are randomly selected one at a time and tested. What is the probability that the third nondefective engine will be found a)on the fifth trial? b) on or before the fifth trial? MY answers: a) P...
*September 29, 2013 by Katy*

**STATISTICS**

PINWORM INFESTATION COMMONLY FOUND IN KIDS CAN BE TREATED WITH THE DRUG PYRANTEL PAMOATE. RESEARCH SHOWS THE TREATMENT IS EFFECTIVE IN ABOUT 90% OF CASES. DRUG IS ADMINISTERED TO 25 KIDS WHAT IS THE PROBABILITY THAT EXACTLY 23 OF THEM ARE CURED? WHAT IS THE PROB. THAT MORE ...
*February 10, 2008 by todd*

**statistics**

PINWORM INFESTATION COMMONLY FOUND IN KIDS CAN BE TREATED WITH THE DRUG PYRANTEL PAMOATE. RESEARCH SHOWS THE TREATMENT IS EFFECTIVE IN ABOUT 90% OF CASES. DRUG IS ADMINISTERED TO 25 KIDS WHAT IS THE PROBABILITY THAT EXACTLY 23 OF THEM ARE CURED? WHAT IS THE PROB. THAT MORE ...
*February 10, 2008 by todd*

**statistics**

Pinworm infestation commonly found in kids can be treated with the drug pyrantel pamoate. Research shows the treatment is effective about 90% of cases. The drug is administered to 25 kids. What is the probability that exactly 23 of them are cured? What is the prob. that more ...
*February 10, 2008 by todd*

**math prob**

how many midsegments does a triangle have?
*May 8, 2009 by gabe*

**math**

so the prob of drawn an ace or spade is 4/52
*October 27, 2009 by rency*

**Math Prob**

ok for changing the base of a log from 10 to e is there a formula?
*December 11, 2008 by confused*

**Finance**

Assuming that the returns from holding small-company stocks are normally distributed, what is the approximate probability that your money will double in value in a single year? What about triple in value. Many of my classmates have an expected return of 17.6% and a standard ...
*July 15, 2012 by Anonymous*

**ECON! Please help!**

Joe: y= 100 (High) prob = 2/5 =25 (medium) prob= 2/5 =0 (low) prob = 1/5 Calculate: 1. José’s risk premium, p, associated with farming and 2. José’s certainty equivalent associated with farming. The village decides to implement an informal insurance (risk sharing) arrangement...
*June 1, 2010 by anonymous*

**math**

okay i am comepletely stuck on this math prob....: x + 5y - 10 = 0 x = 2y - 8 i know the answer is -20/7 , 18/7 but i have no idea how they got it so someone PLZ HELP!!!!
*February 26, 2008 by shelby*

**MATH Prob.**

How many different ways can a teacher line up 5 students for lunch?
*August 20, 2009 by Twg*

**Math- Prob Stat**

How do you determine if a raffle or casino game is fair?
*May 28, 2016 by Kate*

**statistics**

Information given:the distribution of male head circumference (HC) is normal with a mean of 56cm and a standard deviation of 1.8cm first question -the prob that HC of a random chosen man is larger than 57.8cm is? Work: pr(x)>57.8cm z=(57.8-56)=1.8--->.9641 i got it wrong...
*April 15, 2010 by UPD*

**Stats**

nformation given:the distribution of male head circumference (HC) is normal with a mean of 56cm and a standard deviation of 1.8cm first question -the prob that HC of a random chosen man is larger than 57.8cm is? Work: pr(x)>57.8cm z=(57.8-56)=1.8--->.9641 i got it wrong...
*April 15, 2010 by UPD*

**MATH Prob.**

How many three-symbol codes can be formed from the letters I, S, P, and Y without repetition?
*August 6, 2009 by Twg*

**MATH Prob.**

Three angles of a quadrilateral each measures 87*(degrees)..what is the measure of the fourth angle??
*August 19, 2009 by Twg*

**MATH Prob.**

What is the expected value of one 700 tickets in a raffle for a prize of $1400?
*August 20, 2009 by Twg*

**MATH Prob.**

how many three letter symbols can be formed from the letters A,C,K,L, & M without repetition? so far I have 12
*August 8, 2009 by Twg*

**MATH Prob.**

if you have two fair dice that are rolled, what is the probability of a sum 6 given that the roll is a 'double'?
*August 8, 2009 by Twg*

**MATH Prob.**

What are the odds in favor of getting at least one head in three successive flips of a coin?
*August 11, 2009 by Twg*

**MATH Prob.**

There are 6 contestants in a singing competition. How many different ways can first, second, and third place be awarded?
*August 20, 2009 by Twg*

**math**

am having prob..wv zs numb..given that f(x)=x+6/2x,find f(4) and f inverse(x) am not sure abt the answer the frst 1,i get 1.25 and the second oneeee i dnt knw hw to do it
*September 16, 2008 by pallaa*

**MATH Prob.**

How many batting lineups of the nine players can be made for a baseball team if the catcher bats first, the shortstop second, and the pitcher last?
*August 12, 2009 by Twg*

**math prob**

Twelve people attend the first meeting of the Star Wars Club. They exchange e-mail addresses. How many exchanges take place?
*October 6, 2013 by Anonymous*

**MATH Prob.**

What are the odds in favor of drawing a spade and a heart if drawing from a deck of cards w/o replacement?
*August 11, 2009 by Twg*

**MATH Prob.**

A box contains 13 white cards numbered 1 through13. List the sample space of the event choosing one card with a number greater than 6.
*August 8, 2009 by Twg*

**MATH Prob.**

Find the probability of correctly answering the first 4 questions on a multiple choice test if random guesses are made and each question has 3 possible answers.
*August 8, 2009 by Twg*

**MATH Prob.**

There are 8 members on a board of directors. If they must form a subcommittee of 3 members, how many different subcommittees are possible?
*August 20, 2009 by Twg*

**stats again**

ok I get it, so once I get the prob figred for one person, how do I figure it if additional attempts are made and the question is about the prob of at least one of the additional attempts say n = 6 getting the same results as the first Once you have the probability of passing ...
*July 5, 2007 by holly*

**MATH Prob.**

When a single card is drawn from an ordinary 52-card deck, find the odds in favor of getting the 4 of spades.
*August 20, 2009 by Twg*

**algebra**

another prob(last one) 6x-7x=18
*June 8, 2010 by Anonymous*

**11th grade**

hi, i am haveing prob;ems with my math its called solving the quadratic equation but my teacher is not really giving me the attention i need to pass the class but will you help me please
*January 28, 2009 by boartavis*

**MATH Prob.**

A 6-sided die is rolled. The sides contain the numbers 1,2,3,4,5,6. List the sample space of rolling one die.
*August 8, 2009 by Twg*

**MATH Prob.**

Find the probability of correctly answering the first 4 questions on a multiple choice test if random guesses are made and each question has 3 possible answers. A) 4/3 B) 1/81 C)1/64 D)3/4 I automatically think D.
*August 9, 2009 by Twg*

**Prob/Stat**

If P(A) = .3 and P(B) = .4 and P(AandB) = .2 what is P(A/B)? P(B/A)? Are A and B indepentent?
*April 1, 2012 by Sheila*

**quantum**

prob 2 ans please?
*September 13, 2013 by Anonymous*

**MATH Prob.**

Determine whether the situation calls for a discrete or continuous random variable. A)the cost of a random selected orange B)the Ph level of shampoo
*August 20, 2009 by Twg*

**chemistry **

So i if do 4 x250/100 i will get the answer for the prob?
*July 18, 2014 by kody*

**MATH Prob.**

Sam bought 1 of 250 tickets selling for $2 in a game with a grand prize of $400. Was $2 a fair price to pay for a ticket to play this game?
*August 11, 2009 by Twg*

**MATH Prob.**

A student asks, “What’s wrong with the argument that the probability of rolling a double 6 in two rolls of a die is 1/3 because 1/6 + 1/6 = 1/3?" Write an explanation of your understanding of the student’s misconception.
*August 12, 2009 by Twg*

**math prob.**

Through a mix-up on the production line, 6 defective refrigerators were shipped out with 44 good ones. if 5 are selected at random, what is the probability that at least 2 of them are defective? ty in advance!!
*July 25, 2010 by sha*

**Math (prob)**

The probability of an outstanding student pass a biology test is 60%. If he takes three test,which are the experimental results for each test? Please, help me to understand.
*November 26, 2015 by Bet*

**Math (prob)**

The probability of an outstanding student pass a biology test is 60%. If he takes three test,which are the experimental results for each test? Please, help me to understand.
*November 27, 2015 by Bet*

**MATH Prob.**

You are dealt two cards successively without replacement from a standard deck of 52 playing cards. Find the probability that both cards are black.
*August 8, 2009 by Twg*

**SPELLING PLEASE help**

the prob is: middle : center :: thinner : s _ _ _ _er
*November 27, 2007 by Amber*

**PROB**

What is minimum sample needed if you know the SD is 22.36 and an accuracy of 3.06 and you want a confidence level of 90%
*April 24, 2016 by JAMES*

**Prob**

What is minimum sample needed if you know the SD is 22.36 and an accuracy of 3.06 and you want a confidence level of 90%
*April 25, 2016 by Jim*

**Math**

Sorry again but I am terrible at math and I need help help writing this prob into an equation: 50 pounds of potato salad cost $39.50 and 50 pounds of bean salad cost $23.50. What was the difference in costs of the salads?
*September 21, 2014 by Mae*

**math**

I did it right but the paper saud im rong i think the paper is rong lol but the prob is 2(12-8x)=x-11x the answer i got is -6
*January 12, 2011 by bella*

**math**

I did it right but the paper saud im rong i think the paper is rong lol the prob is 4(5n-7)=10n+2 the answer i got is -3
*January 12, 2011 by bella*

**MATH Prob.**

If you select a card from an ordinary deck of 52 playing cards, what is the probability that a diamond is drawn and that a BLACK 10 or a BLACK 7 is drawn??
*August 8, 2009 by Twg*

**MATH Prob.**

How many 4-character license plates are possible with 2 letters from the alphabet followed by 2 digits, if repetitions are allowed? if repetitions are not allowed?
*August 12, 2009 by Twg*

**math prob**

A committee of 5 people is selected from a group of 7 men and 9 women. In how many ways can the committee be selected so it contains at least 1 woman?
*October 6, 2013 by Anonymous*

**MATH**

if f(x)=x[x] / sin[x] then show that there is no existence of lim f(x) x>0 2nd prob: show lim (tanx-sinx)/x^3 =1/2 x>0
*July 11, 2014 by ALOKE*

**stats & prob.**

Given the values of n=5, p= 0.15, and (1-p)=0.85, calculate the standard deviation of the data.
*November 27, 2012 by Georgia*

**probability!**

we were given a chart - "researchers developed the following tabel of joint probabilities of number of drinks per day and development of ulcers" and the question is a. what proportion of people have ulcers - how am i supposed to know htis b. what is the prob that someone who ...
*October 21, 2010 by Lauren*

**MATH Prob.**

A ship carries exactly 10 different signal flags. If each possible combination and ordering of 4 of these flags connotes a specific message, how many signals can be sent with these flags, taken 4 at a time?
*August 12, 2009 by Twg*

**prob.**

If it is given that P(A)=1/3 and P(B/A)=2/3 (the dividing sign is ment to be a vertical bar), what is P(A and B). I got .07. Is this correct? If it isn't, why not?
*December 18, 2008 by Juliette*

**math-binomial prob**

I do not understand the binomial theorem. One of my questions is "there are 5 mutiple choice questions with 4 possible answers each. What is the probability of getting more than 3, exactly 3, and less than 3 correct?" Thanks for any help:)
*December 14, 2007 by Danielle*

**MATH Prob.**

Estimate the number of personally constructed greeting cards possible at a machine if there are 12 designs, 30 messages, 18 closings, and 10 different paper stocks on which to print the card. Indicate how you made your estimate. How valid was your estimate?
*August 12, 2009 by Twg*

**MATH Prob.**

if a bag contains 8 red marbles, 6 blue marbles and 9 green marbles, what is the probability of choosing a blue marble??
*August 8, 2009 by Twg*

**Algebra 2: Prob and Stats**

Find the sample size that produces the margin of error +-4.0% a) 325 b) 25 c) 16 d) 625
*May 24, 2010 by Skye*

**MATH Prob.**

Two cards are drawn without replacement from an ordinary deck of 52 playing cards. What is the probability that the second card is a face card,if the first card was a queen?
*August 8, 2009 by Twg*

**MATH Prob.**

The number of accidents that occur at the intersection of Pine and Linden streets between 3 p.m. and 6 p.m. on Friday afternoons is 0, 1, 2, or 3, with probabilities of 0.84, 0.13, 0.02, and 0.01, respectively. Graph this probability distribution. What is the expected value ...
*August 12, 2009 by Twg*

**MATH Prob.**

A class elects two officers, a president and a secretary/ treasurer, from its 12 members. How many different ways can these two offices be filled from the members of the class?
*August 12, 2009 by Twg*

**Prob and Stats**

In a multiple regression with 5 predictors in a sample of 56 U.S. cities, what would be the critical value for an F test of overall significance at a= .05? A. 2.45 B. 2.37 C. 2.40 D. 2.56
*December 9, 2009 by please help!*

**Calculus**

I'm having difficulty figuring #2 of this prob;em. I'm utterly clueless. Can someone explain it? Please and thank you. y=x 2. List the roots of the function.
*August 18, 2011 by Elee*

**PLEASE HELP - DIVISORS PROB**

What is the probability that a randomly selected divisor of 720 is a multiple of 4? Express your answer as a common fraction.
*November 15, 2012 by failureinmath*

**math prob:(**

a. Solve a – 9 = 20 b. Solve b – 9 > 20 c. How is solving the equation in part a similar to solving the inequality in part b? d. How are the solutions different?
*January 22, 2014 by Princess Anna*

**Math**

Find the next three terms sequence. -2,-12,-72,-432,.... A. -1,728, -6,912, -27,648 B. -1,728, -10,368, -62,208*** C. -2,592, -10,368, -41,472 D. -2,592, -15,522, -93,312 ASAP is good, but if not no prob!
*April 6, 2015 by Anonymous*

**Math**

Question 1 : We would like to test 3 different treatments on a particu- lar type of plant. A worker at the local greenhouse will allow us to use 3 among 10 plants. Note: Each treatment will be used on one and only one plant. a) In how many different ways can we assign the ...
*September 25, 2006 by Lindsay*

**chem**

I am having a hard time with the following : 50 g HCl + 50g Ca(OH)2=H2O+? amt of CaCl2? I dont know how to set this prob. up.Please HELP!Thank you in advance....
*November 12, 2010 by joann*

**mathematic**

a bag contains 3rdmarbles, 2white and 3green a boy takes at one marble at random. what is the prob that it is either red or white?
*February 2, 2015 by joseph *

**MATH Prob.**

The game of dots is played by rolling a fair die and receiving $1 for each dot showing on the top face of the die. What cost should be set for each roll if the game is to be considered a fair game?
*August 11, 2009 by Twg*

**MATH word prob!**

how many gallons of 70% alcohol solution must be mixed with 30 gallons of 23% solution to obtain a solution that is 60% alcohol? How do I solve this problem?
*September 9, 2014 by Anonymous*

**Plz Help!I Need to find Hypotheses for prob.**

If 3x - 7 = -4, then x = 1. Write the hypotheses of this statement
*December 2, 2006 by Margie...*

**MATH Prob.**

Jack is taking a four-item true–false test. He has no knowledge about the subject of the test and decides to flip a coin to answer the items. What is the probability that he receives a perfect score? What is the probability on a 10-item test?
*August 6, 2009 by Twg*

**MATH Prob.**

Five numbers are to be picked, without repetition, from 44 numbers to determine the winner of the Fortune Five game in the state lottery. If the order of the numbers is insignificant, how many different ways can a winning quintuple be selected? What is the probability of winning?
*August 12, 2009 by Twg*

**Prob and Stats**

If X is a random variable with distribution X~N(350,110) find (a)P(X<400) and b)P(250<X<400)
*October 4, 2011 by Kathryn*

**algebra**

-720=x-9x plese explain to me how to do this prob step by step
*June 8, 2010 by Anonymous*

**MATH Prob.**

a bag contains 7 red chips and 10 blue chips. Two chips are selected randomly without replacement from the bag. what is the probability that both chips are red??
*August 8, 2009 by Twg*

**Prob. Math**

Sarah draws a card from a deck of 52 cards. She receives 40 cents for a heart, 50 cents for an ace, and 90 cents for the ace of hearts. The cost of a draw is 15 cents. How much will Sarah lose if she plays this game?
*April 7, 2011 by Traci*

**Prob&Stat**

If 52% of the customers at a certain grocery store regularly use coupons, what is the approximate standard deviation of the sampling distribution of the proportion for samples of size 240? 2.1% 3.2% 4.7% 10.4%
*December 14, 2014 by Bailey*

**accounting ..urgent pls**

can you help please.. PROB 1: A, B and C shared the profit of Rs. 9,00,000 in the ratio of 2:2:1 without providing for interest on B’s loan, B granted a loan of Rs. 4,00,000 in the beginning of accounting year. Where as the partnership deed is silent on the interest on loan ...
*June 1, 2011 by jessie*

**prob**

a music teacher wants to determine the music performances of students.a survey of wich group would produce a random sample
*June 25, 2009 by Anonymous*

**math-story prob**

Quinn is selling raffle tickets. The Ultra tickets cost $3 and the deluxe tickets cost $2. Quinn sold 89 tickets for $235. How many of each ticket did Quinn sell?
*February 15, 2016 by B*

**math**

topic tree diagram. a box contain 6red and 4blue,5white balls.there balls are the bag one after the other without replacement find the prob of obtaining 1 first the same colour 2 first blue 2nd red,than white. 3. 1st red. 4different colours
*June 16, 2016 by Tebiowei*

**math 7**

Mary had a bag that contains 9 green marbles, 7 red marbles, and 8 blue marbles. whats the prob that Mary will draw a green or red marble\
*March 14, 2013 by rockrboiluvr*

**Math**

*Sigh* Can someone explain to me how I would work thru this problem? An honest coin tossed n=3600 times. Let the random variable Y denote the number of tails tossed. (a) find the mean and the standard deviation of the distribution of the random variable Y (b) what are the ...
*October 5, 2006 by SherylA*

**Chem**

I stuck on this prob. Can you help me to do this? 10.00 mL of a solution containing 0.20 M NaCl and 0.25 M AlCl3 is introduced into a cation exchange column. How many moles of hydronium ions will be released by the column?
*October 22, 2010 by Kim*