Monday

April 21, 2014

April 21, 2014

Number of results: 102,213

**math answer check**

Three coins are tossed, and the number of heads observed is recorded. (Give your answers as fractions.) (a) Find the probability for 0 heads. Incorrect: Your answer is incorrect. . Your answer cannot be understood or graded. More Information Redone 0/3 was my answer (b) Find ...
*Saturday, June 1, 2013 at 4:34pm by Nora 4*

**Advanced Math**

The probability of getting 2 heads and 1 tail when three coins are tossed is 3 in 8. Find the odds of not getting 2 heads and 1 tail. ANSWER: 5:8? Three Coins are tossed. Find the probability that exactly 2 coins show heads if the first coin shows heads.? ANSWERS: Could it be ...
*Wednesday, June 10, 2009 at 5:36pm by Patrick*

**math**

Three coins are tossed. Find the probability that no more than one coin lands heads up.
*Thursday, November 19, 2009 at 11:49am by shree*

**math probabilty**

Find the (theoretical) probability of the given event, assuming that the coins are distinguishable and fair, and that what is observed are the faces uppermost. Six coins are tossed; the result is at most one head.
*Sunday, December 5, 2010 at 12:10am by Liz*

**statistic****help*******

if three coins are tossed, what is the number of equally likely outcomes? 3 4 6 8 9
*Wednesday, March 19, 2014 at 2:04pm by HELEN*

**math**

Twenty-three coins are tossed; in how many ways can you have at least two tails?
*Friday, May 3, 2013 at 1:08pm by marlene*

**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 ...
*Sunday, January 22, 2012 at 4:45am 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 ...
*Sunday, January 22, 2012 at 4:45am 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 ...
*Sunday, January 22, 2012 at 11:59pm 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 ...
*Tuesday, January 24, 2012 at 1:15am by sand*

**Math**

Suppose three coins are tossed. What's the probability of having exactly 1 tail, 3 tails, or all the same?
*Friday, April 20, 2012 at 9:37am by Carol*

**math**

three coins are tossed simultaneously ,what is the is the possible outcome of getting two head one tail ???
*Wednesday, October 3, 2012 at 11:31am by TUHITUHI*

**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.
*Friday, July 6, 2012 at 2:19am by jilla*

**College math**

Three coins are tossed. How many ways are there to get more than 2 tails, exactly 2 heads, only 1 tail. Thanks in advance for the help!
*Thursday, April 25, 2013 at 12:34pm by Lorie*

**math**

Clayton has three fair coins. Find the probablitlity that he gets two tails and one head when he flips the three coins.
*Sunday, January 31, 2010 at 8:47pm by haseeb *

**math**

two coins are tossed list all the possible outcomes what is the probability that both of the coins land heads-up?
*Monday, September 3, 2012 at 3:48am by frank *

**Math**

Susan has some $2-coins and $5-coins. If there are 18 coins and the total amount of these coins is not less than $75, find the minimum number of $5-coins.
*Sunday, October 2, 2011 at 12:17am by Nicole*

**math**

three fair coins are tossed. What is the probability that at least one is tail. Enter probability as a fraction
*Sunday, March 3, 2013 at 8:42pm by Andrzej*

**Math**

9 fair coins are independently tossed in a row. Let X be the random variable denoting the number of instances in which a Head is immediately followed by a Tail during these 9 tosses. The variance of X has the form a/b, where a and b are coprime integers. What is the value of a...
*Saturday, April 20, 2013 at 7:17am by Zeneth*

**Math - Algebra**

The number 350 is separated into three parts (numbers). Dividing the first number by the third will give 2 and dividing the second number by the pfirst number will give 5 and a remainder of 25. Find the three numbers. Andy has 145 coins in his coin bank. THe number of 5-...
*Sunday, January 5, 2014 at 12:14am by Ashley Kate*

**Math**

9 fair coins are independently tossed in a row. Let X be the random variable denoting the number of instances in which a Head is immediately followed by a Tail during these 9 tosses. The variance of X has the form ab, where a and b are coprime integers. What is the value of a+...
*Saturday, April 20, 2013 at 7:11am by Ichigo*

**math**

Start with one quarter, 3 dimes. That is 55cents, and you have 5 coins left to make 38 cents? I dont see how. So try 2 quarters, 4 dimes. That is six coins, which is 90 cents. You have three coins left, can you make 3 cents with those three coins?
*Monday, November 5, 2007 at 6:14pm by bobpursley*

**Science**

Can someone tell me if this is correct: How many forces act on an upwardly tossed coin when it gets to the top of its path? A. one the force due to gravity B. two gravity & the force in the coin itself C. three gravity the coins internal force & a turnaround force D. none of ...
*Friday, September 21, 2012 at 8:20pm by Sue*

**math**

Three coins are selected from 10 coins: 4 dimes, 4 nickels, and 2 quarters. In how many possible ways can the selection be made so that the value of the coins is at least 25 cents? I know that the total outcomes equals 120, but how do I find how many of these have the value of...
*Saturday, February 21, 2009 at 9:08pm by Zoe*

**statistics**

Two dice are rolled and two fair coins are tossed. Let X be the sum of the number of spots that show on the top faces of the dice and the number of coins that land heads up. The expected value of X is _____ .
*Friday, July 22, 2011 at 8:31pm by mike*

**statistics**

Two dice are rolled and two fair coins are tossed. Let X be the sum of the number of spots that show on the top faces of the dice and the number of coins that land heads up. The expected value of X is _____ .
*Friday, July 22, 2011 at 8:31pm by mike*

**Math**

5 coins are tossed. How many outcomes are possible?
*Monday, March 17, 2008 at 9:04pm by Jesse*

**maths**

A bag contained a number of 20cents, 50cents and $1 coins. 1/3 of the 20cents coins is equal to 2/3 of the 50cents coins. There are 3/5 as many 50cents coins as $1 coins. If the total value of these coins is $23.10, how many coins are there altogether ? (non-algebra solution ...
*Wednesday, December 28, 2011 at 9:20am by joi*

**common fraction**

Sara tossed a fair coin five times, and Kaleb tossed a fair coin three times. There were five heads and three tails in the eight tosses. What is the probability that either Sara or Kaleb tossed exactly three heads? Express your answer as a common fraction.
*Wednesday, June 27, 2012 at 1:15pm by Anonymous*

**math**

How many possible outcomes are there for 15 coins tossed simultaneously?
*Sunday, April 17, 2011 at 8:30pm by Zac*

**Math**

A game is played flipping three coins. If all three coins land heads up you win $15. If two coins land heads up you win $5. If one coin lands heads up you win $2. If no coins land heads up you win nothing. If you pay $4 to play, what are your expected winnings?
*Sunday, December 20, 2009 at 11:26pm by Michelle*

**5th grade math**

I need to use quarters, dimes, nickles and pennies to make the following: $1.53 in 12 coins $2.53 in 20 $2.32 in 15 coins $2.00 in 22 $1.45 in 10 coins $1.76 in 16 coins $0.85 in 11 coins $1.01 in 12 coins $1.29 in 15 coins
*Tuesday, September 24, 2013 at 10:48pm by Kyle*

**math**

You have six coins. three of them are 25cents. what fraction of the coins are 25cents coins?
*Sunday, November 25, 2012 at 9:47pm by huxley*

**Probability**

Nine coins are tossed; in how many ways can you have at least two tails?
*Sunday, January 17, 2010 at 3:21pm by Anonymous*

**Intro to probability**

Wait a minute, they said two coins. Assume each tossed once. n = 2
*Saturday, February 23, 2008 at 9:52pm by Damon*

**Word Problem.**

A game is played by flipping three coins. If all three coins land heads up you win $15. If two coins lands heads up you win $5. If one coin lands heads up you win $2. If no coins land heads up you win nothing. If you play $4 to play, what are your expected winnings?
*Sunday, March 7, 2010 at 8:40pm by Lyndse*

**math**

Two coins are tossed, find the probability that two heads are obtained. Note: Each coin has two possible outcome H(heads), and T (tails).
*Wednesday, May 30, 2012 at 10:40am by miss c*

**Math**

2 coins and 1 six sided cube are tossed. What is the probability of getting two heads and and a four?
*Wednesday, June 17, 2009 at 8:33pm by Elizabeth*

**Math**

Need to know the number possible of outcomes.If you spin a spinner with sections A,B,C,D ,and E and two coins are tossed
*Monday, January 9, 2012 at 7:11pm by Linda*

**Math**

A bag contains forty coins, all of them either 2c or 5c coins. Let there be x 2c coins and y 5c coins. If the value of money in the bag is $1.55, find the number of each kind.
*Thursday, May 12, 2011 at 9:36am by AJ*

**Stats**

You are asked to draw THREE coins from a jar one at a time without replacement. The jar contains FIVE dimes, TEN pennies, and EIGHT quarters. (a) What is the probability that all three coins are pennies?
*Tuesday, July 10, 2012 at 6:34pm by Anonymous*

**math**

jeremy has 19 coins of 2 different values. the total value of coins is 1$ what are the coins and how many of each coins does he have
*Thursday, February 23, 2012 at 7:32pm by sam*

**10th grade**

well first you find how many coins there are in all. In this problem the entire amount is 6 coins, 3 of the 6 coins are dimes, if you pull out one dime there are now 2 dimes out of 5 coins ( because you took one away) so the answer would be two out of five chances.
*Sunday, December 5, 2010 at 11:26pm by Meagan*

**4th grade**

Bobby has only pennies, dimes, and quarters. One half of Bobby's coins are pennies. One fourth of his coins are quarters. Three of his coins are dimes. How many coins does Bobby have? please help me figure this one out?
*Wednesday, April 8, 2009 at 5:57pm by Lynnese*

**Algebra**

Could someone please help me with those 2 problems...thanks a lot for any of your help Use an algebraic approach to solve the problem. Find three consecutive integers whose sum is 57. Suppose that Maria has 140 coins consisting of pennies, nickels, and dimes. The number of ...
*Friday, September 10, 2010 at 5:30pm by Joe*

**math**

selecting three (3) coins, but assume that there are 5 dimes, 4 nickels, and 2 quarters. In how many possible ways can the selection be made so that the value of the coins is at least 25 cents?
*Wednesday, September 15, 2010 at 10:41pm by Shawn*

**Math**

Select three (3) coins, but assume that there are 4 dimes, 4 nickels, and 2 quarters. In how many possible ways can the selection be made so that the value of the coins is at least 25 cents?
*Wednesday, January 26, 2011 at 11:29pm by Amanda*

**math**

father gives his son three coins totaling 55 cents for school lunch. What coins did the boy receive if one coin is not a nickel?
*Monday, December 3, 2012 at 8:54am by suzy*

**math**

Sasa had some 20-cent and 50-cent coins. 7/8 of the coins were 20-cent coins and the rest were 50-cent coins.After Sasa had spent $72.50 worth of 50-cent coins and 5/7 of the 20-cent coins, she had 2/7 of the coins left. Find the total amount of money Sasa left.
*Thursday, April 19, 2012 at 12:03am by Al*

**math homewok**

There are nine coins on the table , 5 nickels , 3 quarters and 1 dime. Tom , Bill and Drew each pick up three coins. Bill has 25 cent more than Tom. Drew has as much money as Tom and Bill together . What three coins Drew to pick up? my answer: Drew ===)2 quarters+i nickel Is ...
*Wednesday, October 24, 2012 at 10:41pm by Bob*

**statistic 125**

have three coins, two of which are fair and the other is a double header .suppose a coin is selected using random selection and tossed twice,one after the other.if i got two heads what is the probability that the coin that was selected was the double header?
*Wednesday, March 21, 2012 at 7:08pm by vanessa*

**Probability **

4 fair coins are tossed. What is the probability that all the outcomes are heads?
*Wednesday, November 28, 2012 at 11:49am by Tina*

**algebra/functions**

Dave started his coin collection with 25 coins. the first wee he added 2 coins, the next week he added 4 coins, and the third wee he added 6 coins. If Dave continues adding coins in the same way, how many coins will he have in his collection after one year (52 weeks)? My ...
*Friday, June 29, 2012 at 1:11pm by luckybee*

**English**

1. What do you think the judge did? He made the greedy baker hear the sound of three gold coins. By doing that, he paid for the smell of delicious cakes that the poor traveler used. Do you agree with the judge's decision or not? If you don't agree with the judge's decision, ...
*Tuesday, November 10, 2009 at 1:54am by rfvv*

**math**

Bobby has only pennies, dimes, and quarters. One half of Bobby's coins are pennies. One fourth of coins are quarters. Three of his coins are dimes. How many coins does Bobby have?
*Sunday, February 5, 2012 at 1:38pm by Anonymous*

**maths**

Andrew has 7 20c coins and 5 50c coins in his piggy bank. What is the smallest number of coins he might have to shake out to be certain of having 2 50c coins?
*Wednesday, April 25, 2012 at 12:12am by Carolyn*

**Math**

Shirley has 18 coins. One sixth of the coins are quarters, one third of the coins are dimes, and one half of the coins are nickels. What is the value of Shirley's coins?
*Monday, May 3, 2010 at 12:52am by Mia*

**Intro to probability**

Two balanced coins are tossed. What are the expected value and the variance of the number of heads observed? ================================== I'm confused on how to start. I don't know how many times im suppose to toss coin, and how to set up my table for the expected value ...
*Saturday, February 23, 2008 at 9:52pm by amelie*

**math**

liza has three hundred seventen coins in her collection. Tamca has found five hundred eighty-one coins in her collection. Tamca has how many more coins then liza?
*Monday, October 25, 2010 at 9:08pm by jojo*

**aig math**

Janet has 73 coins. Linda has 28 more coins then Janet, but 17 fewer coins than Alan. Sam has 33 fewer coins than Alan. How many more coins does same have than Janet? My answer is 12 coins, am i right? If not please tell me your answer and how you got it.
*Sunday, March 10, 2013 at 6:37pm by lidia*

**MATHS**

A PERSON HAS 1&2 RUPEE COINS WITH HIM.TOTAL NUMBER OF COINS WITH HIM IS 50.TOTAL AMOUNT WITH HIM IS 75.FIND HOW MANY 1&2 RUPEE COINS ARE THERE WITH HIM
*Monday, August 22, 2011 at 7:40am by monica*

**MATHS**

A PERSON HAS 1&2 RUPEE COINS WITH HIM.TOTAL NUMBER OF COINS WITH HIM IS 50.TOTAL AMOUNT WITH HIM IS 75.FIND HOW MANY 1&2 RUPEE COINS ARE THERE WITH HIM
*Monday, August 22, 2011 at 7:41am by monica*

**MATH**

IF FOUR COINS ARE TOSSED, CONTRUCT A POSSIBILITY TREE TO DETERMINE IN HOW MANY WAYS ONR CAN OBTAIN TWO HEADS AND TWO TAILS
*Thursday, October 4, 2007 at 7:26am by DREENA*

**English**

1. What do you think the judge did? He made the greedy baker listen to the sound of three gold coins dropping on the table. By doing that, he paid for the aroma of delicious cakes that the poor traveler smelled. Do you agree with the judge's decision or not? If you don't agree...
*Tuesday, November 10, 2009 at 1:54am by Writeacher*

**math**

Three dimes are tossed at the same time. What is the probability that all three land on heads?
*Thursday, October 17, 2013 at 3:30pm by Anonymous*

**math**

three coins, a half-dollar, quarter, nickel are tossed at the same time. to say that there is an outcome xyz means that the half-dollar, landed x, the quarter landed y, and the nickel landed z. the eight equally likely possibilites can be listed as follows: HHH HHT HTH HTT THH...
*Monday, May 14, 2012 at 11:16pm by jose*

**5th Grade Math**

divide the coins into four equal numbered piles. How many coins are in each pile? Three of those piles is pennies, and one is nickles. So what it the value of the money?
*Saturday, August 29, 2009 at 3:43pm by bobpursley*

**Grade 5 Maths**

A coin box contained some twenty-cent and fifty-cent coins in the ratio 4:3. After 20 twenty-cent coins were taken out to exchange for fifty-cents coins of the same value and put back in the box, the ratio of the number of twenty-cent coins to the number of fifty-cents coins ...
*Sunday, January 19, 2014 at 11:37pm by LARA*

**math**

Not enough information. What kind of coins ? US has only 4 commonly used coins (hard to find half-dollars or 'silver dollars' ) Canada has 6 commonly used coins The Euro has a 20 cents coin etc.
*Sunday, January 9, 2011 at 8:39am by Reiny*

**GEOmetry(Special Coin Placement)**

Three coins are randomly placed into different positions on a 4×10 grid. The probability that no two coins are in the same row or column can be expressed as a/b where a and b are coprime positive integers. What is the sum of a+b?
*Tuesday, April 2, 2013 at 3:56am by please help me out!!*

**math**

Karen collects local and foreign coins. of the coins in her collection, 1/4 are foreign coins. of the coins, 2/5 are from mexico. what fraction are foreign coins that are not from mexico?
*Tuesday, January 29, 2013 at 7:39pm by shohanur*

**MATH**

There are 10 similar coins, but 2 of them are fake. The fake ones are lighter than the real ones, but both have the same weight. You are give a balance scale, and you should determine which coins are fake. At least how many weighings do you need to find the fake coins?
*Wednesday, December 23, 2009 at 9:42pm by Jill*

**PreCal**

You have 1000 coins. Start by placing one coin in its own "stack." Next to the first stack, make a stack of two coins. Then make a stack of four coins and continue creating stacks of coins, each stack twice as high as the previous one. Now I figured it would be 13 stacks by ...
*Sunday, December 1, 2013 at 7:20pm by Terri*

**maths**

Three coins are randomly placed into different positions on a 4×10 grid. The probability that no two coins are in the same row or column can be expressed as ab where a and b are coprime positive integers. What is the probability of a+b?
*Monday, April 1, 2013 at 5:44am by rohit*

**maths**

I don't know what country you are in, but I am not aware of "20c coins." To be4 absolutely certain of getting 2 50c coins, you would have to shake out 9 coins. This is assuming the worst scenario that all the 20c coins come out first.
*Wednesday, April 25, 2012 at 12:12am by PsyDAG*

**math answer check**

Tossing a coin was a good idea, but you can't control what happens. Better would have been to take three coins and line them up, then ask what are all the possible outcomes of 3 coins in a row? and start flipping them around.
*Saturday, June 1, 2013 at 4:34pm by Steve*

**math**

Six fair coins are flipped, the probability that exactly three coins turns up heads is T. If the coins are flipped again, the probability that exactly 16T coins turns up heads is S. If the six coins are flipped again, the probability that exactly 32S coins turns up heads is Q...
*Sunday, November 7, 2010 at 3:09pm by zid*

**Maths**

The ratio of the number of coins Azam had to the number of coins Eddie had was 3:7. Eddie gave 42 coins to Azam and they ended up having the same number of coins. How many coins did each person have at first?
*Sunday, September 30, 2012 at 7:07am by Zayn*

**math**

9 fair coins are independently tossed in a row. Let X be the random variable denoting the number of instances in which a Head is immediately followed by a Tail during these 9 tosses. The variance of X has the form ab, where a and b are coprime integers. What is the value of a+b?
*Thursday, April 18, 2013 at 3:11am by Daniel*

**Math**

Cheryl gave Brenda 7 coins worth .92 cents. Two coins were quarters. What were the other 5 coins?
*Monday, November 24, 2008 at 4:10pm by Tracy*

**math**

lavere has sixty-one coins, all of which are dimes and quaters. if the total value of the coins is $9.85, how many of each kind of coins has she?
*Sunday, March 8, 2009 at 10:15pm by ranujan*

**Math**

Two coins are tossed in order. What is the probability of getting a head on the first coin and then getting a tail on the second coin?
*Saturday, June 13, 2009 at 12:03pm by Maya*

**math**

A game is played by flipping three coins. If all three coins lands heads up you win $15. If two coin lands heads up you win $5. If one coin lands heads up you win $2. If no coins land heads up you win nothing. If you play $4 to play, what are you expected winnings? Answer ...
*Tuesday, April 13, 2010 at 9:10pm by nicole*

**Math**

Zach has two pennies, a nickel, three dimes and two quarters. If he picks two of the coins at random, how many distinct values are possible for the two coins combined?
*Friday, September 20, 2013 at 7:08pm by Anonymous*

**Probability**

Mary had 6 pennies and 4 nickels. If she took three coins, what is the probability that all the coins were pennies? I think it's 18/24.
*Sunday, March 30, 2008 at 5:21pm by Ktowns*

**dynamath**

the value of 2 coins is 35 cents. one of the coins is not a quarter. what are the 2 coins
*Monday, June 7, 2010 at 10:47pm by Jordan*

**grade 9 math!!!!!!!!!! please help**

lavre has sixty-one coins, all of whichare dimes and quaters. if the total value of the coins is $9.85, how many of each kind of coins has she?
*Sunday, March 8, 2009 at 10:33pm by selena*

**Math,Ratio**

the ratio of the number of coins Azam had to the number of coins Eddie had was 3:7.Eddie gave 42 coins to Azam and they ended up having the same number of coins.how many coins did each person have at first? pls show ur answer purely!
*Friday, February 3, 2012 at 12:26am by Da S*

**math**

Jo has 37 coins (all nickels, dimes and quarters) worth $5.50. She has 4 more quarters than nickels. How many of each type of coins does she have? d=#dimes n=#nickels q=#quarters. ============== d+n+q=37 n+4=q 0.1d + 0.05n + 0.25q = 5.50 ============================= three ...
*Monday, January 1, 2007 at 11:45am by Kt*

**Math**

Julian has 10 coins. Sue has 5 coins. There is a total of 4 quarters. Sue has more than $1.00. Sue's coins are worth twice as much as Julian's coins.
*Monday, May 16, 2011 at 11:29am by Jon*

**Math,Ratio**

the ratio of the number of coins Azam had to the number of coins Eddie had was 3:7.Eddie gave 42 coins to Azam and they ended up having the same number of coins.how many coins did each person have at first? pls sh
*Friday, February 3, 2012 at 12:25am by Da S*

**Math**

Hi, I need some help with this question. Could anyone help? Tammy has 15 coins that total $1. What coins does she have and how many of each? Is there more than one answer? Find all the possibilities. Thanks, Hannah
*Monday, August 12, 2013 at 6:33pm by Hannah*

**PROBLEM SOLVING IN MATHEMATICS**

you have 13 bags of gold wins. out of 13 bags gold coins, there is one bag gold coins lighter. assume that one real gold coins is 10g and the fake is 9g. now, you are given a electronic beam balance. find the most minimum ways to figure out which bag of gold coins is lighter.
*Friday, September 30, 2011 at 11:40am by alya*

**PROBLEM SOLVING IN MATHEMATICS**

you have 13 bags of gold wins. out of 13 bags gold coins, there is one bag gold coins lighter. assume that one real gold coins is 10g and the fake is 9g. now, you are given a electronic beam balance. find the most minimum ways to figure out which bag of gold coins is lighter.
*Saturday, October 1, 2011 at 12:52pm by alya*

**math**

I do not know how to answer this question. Would someone please help me with each of the four question below? Thank you. Question 1. Write the sample space for the outcomes of tossing three coins using H for heads and T for tails. Question 2. What is the probability for each ...
*Thursday, February 17, 2011 at 7:57am by Dave*

**Math**

Suppose you toss three fair coins. You win 32 cents if all three coins come up the same. You win 8 cents if exactly 1 head occurs, and you win 48 cents if exactly 2 heads appears. Would you pay 30 cents to play this game? If not, then how much would you be willing to pay?
*Sunday, November 25, 2012 at 4:47pm by cd*

**data management grade 12 **

Cecile tosses 5 coins,one after the other. a) How many different outcomes are possible? b) In how many ways will the first coin turn up heads and the last coin turn up tails? c) In how many ways will the second third and fourth coins all turn up heads? d) would the same ...
*Friday, February 5, 2010 at 8:35pm by Paul*

**Math**

Split the coins into three groups, A, B and C consisting of 3 coins in each group. Weigh: A--B 1. If A=B, the the counterfeit is in group C Weigh any two coins in group C and figure out the rest. 2. If A≠B, then the counterfeit is in the lighter group. Weigh any two coins ...
*Sunday, November 28, 2010 at 9:52pm by MathMate*

**Statistics**

In each of the following situations, state whether or not the given assignment of probabilities to individual outcomes is legitimate, that is, satisfies the rules of probability. If not, give specific reasons for your answer. a.) when a coin is spun, P(H)=0.55 and P(T)=0.45. b...
*Wednesday, November 2, 2011 at 9:24pm by Mandy*

**Math**

Cindy had $1.08 using 9 coins. She had as many pennies as dimes. There must be 4 pennies as 9 pennies would not allow for any other coins. Since there are supposed to be as many dimes as there are pennies, 4P + 4D = 44 cents. That leaves 65 cents to come from 1 coin which is ...
*Wednesday, May 21, 2008 at 7:56pm by tchrwill*

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