Wednesday

July 30, 2014

July 30, 2014

Number of results: 90,752

**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 ...
*June 1, 2013 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 ...
*June 10, 2009 by Patrick*

**math**

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

**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*

**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*

**math**

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

**algebra/check my answer**

Three fair coins are tossed. What is the probability that at least one is a head? (Enter the probability as a fraction.) I came up with 7/8 Thank you
*May 27, 2014 by Mary Ann *

**Math**

Four coins fall onto the floor. Find the probability that (a) exactly three coins land heads up (b) all coins land tails up (c) two or more coins land heads up (d) no more than two coins land tails up (e) at least one coin lands tails up
*June 18, 2014 by Shelagh*

**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.
*December 5, 2010 by Liz*

**Math**

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

**Probability**

Four Coins are tossed. Describe the sample space S, probability of getting more tails than heads and probability of getting at least two heads.
*June 22, 2014 by rosie*

**math**

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

**Probability**

Four coins are tossed. What is the probability of getting more tails than heads and getting at least two heads?
*June 22, 2014 by rosie*

**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!
*April 25, 2013 by Lorie*

**Probability **

4 fair coins are tossed. What is the probability that all the outcomes are heads?
*November 28, 2012 by Tina*

**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-...
*January 5, 2014 by Ashley Kate*

**statistics**

Five coins all balanced the same were tossed 150 times. Note that, while the coins are all balanced the same, they may or may not be fair coins. Since five coins were tossed, the possible number of heads for each toss could be zero through five. The following table gives the ...
*May 13, 2014 by scott*

**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?
*April 1, 2013 by rohit*

**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.
*March 30, 2008 by Ktowns*

**Math**

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

**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...
*November 7, 2010 by zid*

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

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

**Math**

1.Four coins are tossed.What is the probability of tossing all heads? 2.A card is chosen at random from a deck of 52 cards.It is then replaced and a second card is chosen.What is the probability of getting a jack and then an eight?
*February 17, 2010 by Shadow*

**Math**

1.Four coins are tossed.What is the probability of tossing all heads? 2.A card is chosen at random from a deck of 52 cards.It is then replaced and a second card is chosen.What is the probability of getting a jack and then an eight?
*February 17, 2010 by Shadow*

**math**

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

**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).
*May 30, 2012 by miss c*

**algebra**

1. you randomly choose an integer from 10 to 20. what are the odds that the integer is 15 or less? 2. you toss a six-sided number cube 15 times. for nine of the tosses the number tossed was 4 or more. what is the experimental probability than a number tossed is 4 or more? ...
*September 13, 2009 by lamiya*

**math**

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

**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?
*July 10, 2012 by Anonymous*

**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.
*June 27, 2012 by Anonymous*

**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 ...
*February 17, 2011 by Dave*

**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*

**math probability**

there are 3 nickles 2 dimes and 5 quarters in a purse. the three coins are selected in succession at random. find the probability of selecting2 nickles , then a quarter.
*March 31, 2011 by carly*

**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*

**math**

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

**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+...
*April 20, 2013 by Ichigo*

**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...
*April 20, 2013 by Zeneth*

**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.
*October 2, 2011 by Nicole*

**math**

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

**Pre-Algebra**

Hi, Well, I have a test tomorrow and I was hoping thats someone could maybe help me? I don't understand probability... Here's a question I don't understand: Find the probability of tossing three coins and getting only two tails. Can anyone help?
*May 23, 2008 by Lily*

**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.
*March 10, 2013 by lidia*

**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
*September 24, 2013 by Kyle*

**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?
*April 2, 2013 by please help me out!!*

**math**

Daniel flips 2 coins. Find the probability of the coins both coming up heads. I think 2/4 or 1/2 Serena has a bag filled with 10 breakfast bars. She knows that 1 of them is her favorite. Find the probability that she will select her favorite bar by reaching into the bag ...
*March 13, 2014 by Anonymous*

**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?
*March 21, 2012 by vanessa*

**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...
*November 2, 2011 by Mandy*

**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?
*June 13, 2009 by Maya*

**math**

When two die are tossed,throwing a sum of 7 is three times more likely than throwing a sum of 11.if the probability of throwing a sum of 11 is 1:18,what is the probability of throwing a sum of 7?
*May 2, 2012 by Cherie*

**Probability**

Two fair coins are flipped simultaneously. This is done repeatedly until at least one of the coins comes up heads, at which point the process stops. What is the probability that both coins come up heads? I think it would be 1/2 but the answer is 1/3 and I have no idea where ...
*March 1, 2008 by Anonymous*

**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 ...
*February 23, 2008 by amelie*

**math**

For a fair coin tossed three times, the eight possible simple events are HHH, HHT, HTH, THH, HTT, THT, TTH, TTT. Let X = number of tails. Find the probability distribution for X by filling in the table showing each possible value of X along with the probability that value ...
*October 9, 2010 by Anonymous*

**math**

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 7, 2013 by lasnikha*

**Algebra**

Andy has 145 coins in his coin bank. THe number of 5-denomination coins is 10 more than twice the number of 10-denomination coins. The difference between the number of 1-denomination coins and 5-denomination coins is 5 more than the number of 10-denomination coins. How many of...
*January 6, 2014 by Ashley Kate*

**maths-urgent**

a man 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 1000 p ?
*February 10, 2013 by Anonymous*

**math**

1. A teacher has 10 boys and 12 girls in her grade school class. In how many ways can she select 8 of the children to be in a play if she must select 5 boys and 3 girls. 2. The manager of the various displays in the Acme Fine Clothing Emporium has a window which will hold 4 ...
*July 29, 2012 by kwame*

**Math**

Ryder tossed two coins 50 times.He recorded two heads 11 times. A)what is the experimental probability of obtaining two heads as a percent? b)the theoretical probability of obtaining two heads is 25%.How could Ryder repeat the experiment to obtain an experimental probability ...
*May 4, 2012 by Cherie*

**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 ...
*October 24, 2012 by Bob*

**Probability **

A pair of fair dice is tossed once. Find the probability a sum of 5 or 3 appears.
*May 2, 2012 by Amanda*

**mathematics**

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 6, 2013 by amartya*

**math: probabilities**

Three regular six-sided dice are tossed in succession. What is the probability that all three outcomes are different? Choose from the following Answers: 5/9 25/36 2/3 1/192 How do I even begin with this problem?
*June 2, 2010 by M.A.*

**Probability**

three fair dice are tossed. Let X,Y,Z denote the respetive numbers showing on their top faces. Assume X,Y,Z are independent. a) find P(X<Y) b) Show that the events (X<Y) and (Y<Z) are NOT independent heeelp...
*November 18, 2007 by Danny*

**Math**

Assume that you select 2 coins at random from 5 coins: 3 dimes and 2 quarters. What is the probability that all of the coins selected are dimes?
*February 15, 2012 by Kelly*

**math**

an unbiased coin is tossed six times. find the probability of the given event. the coin lands heads more than once.
*April 23, 2014 by Dee*

**math**

an unbiased coin is tossed six times. find the probability of the given event - the coin lands heads more than once.
*April 25, 2014 by Daren*

**Math**

Luis has a coin that is weighted so that the probability that Heads appears when it is tossed is 0.55. Suppose that the coin is tossed 3 times. What is the probability that all 3 tosses are Heads? please help ,e to solve this question . i dont'know if i +am right .55/2+.55/2+....
*February 17, 2012 by sajid*

**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?
*October 25, 2010 by jojo*

**stat probability**

A coin is tossed 4 times. Find the probability that the 4th toss is a tail, given that the first 3 tosses were all heads.
*April 8, 2013 by Lynn*

**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?
*December 20, 2009 by Michelle*

**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...
*February 21, 2009 by Zoe*

****************HELP STATISTIC PLEASE***************

NEED SOMEONE TO RECHECK ANS *****HELP PLEASE HAS STAR BY MY ANSWER If P (A) = 0.2 and P (B) = 0.3 and A and B are disjoint, what is P (A or B)? (1 point) 0.00 0.06 0.10 0.44 *0.50 4. Given that you roll a fair six-sided die, what is the probability that you roll an odd number...
*March 20, 2014 by TIKIMA*

**Probability NEED HELP**

1. When two fair dice are tossed, what is the probability of a sum of 4 or a sum of 8? 2. When two fair dice are tossed, what is the probability of doubles or a sum over 9? 3. Evaluate 1025! / 1022! Please help
*May 11, 2011 by Hannah*

**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 ...
*January 1, 2007 by Kt*

**Math**

A penny, a nickel and a dime and a quarter are tossed. What is the probability of obtaining at least three heads?
*November 16, 2012 by Sara Beth*

**Algebra 2**

A coin is tossed three times. Find the probability of each event. a) at least two tosses come up tails. b) at least one toss comes up heads. PLEASE SHOW ALL WORK!
*December 9, 2009 by Trisan*

**Algebra 2**

A coin is tossed three times. Find the probability of each event. a) at least two tosses come up tails. b) at least one toss comes up heads. PLEASE SHOW ALL WORK!
*December 9, 2009 by Trisan*

**Probability**

1. When two fair dice are tossed, what is the probability of a sum of 4 or a sum of 8? 2. When two fair dice are tossed, what is the probability of doubles or a sum over 9? 3. Evaluate 1025! / 1022! Please help
*May 11, 2011 by Hannah*

**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 _____ .
*July 22, 2011 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 _____ .
*July 22, 2011 by mike*

**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 ...
*December 28, 2011 by joi*

**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.
*May 12, 2011 by AJ*

**probability**

A box of 6 coins (penny, nickel, dime or quarter) worth $0.67 is shaken. What is the probability that a nickel is drawn first and then a quarter? Assume no replacement and that all coins are equally likely.
*September 28, 2010 by taylor*

**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
*August 12, 2013 by Hannah*

**Math**

5 coins are tossed. How many outcomes are possible?
*March 17, 2008 by Jesse*

**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 ...
*September 21, 2012 by Sue*

**Math**

A fair die is tossed and the number facing up is noted. If the probability of getting at least one ‘six’ is to exceed 0.9, how many times should the die be tossed.
*May 10, 2012 by Koia*

**statistics**

A fair die is tossed and the number facing up is noted. If the probability of getting at least one ‘six’ is to exceed 0.9, how many times should the die be tossed.
*May 11, 2012 by Nesa*

**math**

How many possible outcomes are there for 15 coins tossed simultaneously?
*April 17, 2011 by Zac*

**Math problem I need help with**

Combination of coins that can be used; fifty-cent piece, quarters, dimes, nickels, and pennies Q: My 3 types of coins total 37 cents. I have fewer than 4, but more than 1, of each coin. What are the coins?
*November 9, 2009 by Tyler*

**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?
*March 7, 2010 by Lyndse*

**math**

probability... two dice are tossed.... and their sum is recorded ..find probability p ( sum is between 2 and 9)
*August 25, 2010 by tana*

**Probability **

A pair of fair dice is tossed 3 times. Find the probability a seven appears 3 times.
*February 20, 2011 by Traci*

**probability**

two dice are tossed. find the probability that the sum is odd given that the sum is 5 or less
*June 12, 2012 by Anonymous*

**Math**

Of households in the United States, 18 million, or 16%, have three or more vehicles, as stated in USA Today (June 12, 2002), quoting the Census Bureau as the source. (a) If two U.S. households are randomly selected, find the probability that both will have three or more ...
*July 4, 2012 by Jane*

**algebra**

Suppose that in a particular game two dice are tossed, and various amounts are paid according to the outcome. Find the requested probability. (Enter the probability as a fraction.) If a seven or an eight occurs on the first roll, the player wins. What is the probability of ...
*May 27, 2014 by Mary Ann *

**Stats**

The probability that a person has blue eyes is 16%. Three unrelated people are selected at random. a. Find the probability that all three have blue eyes: b. Find the probability that none of the three have blue eyes c. Find the probability that one of the three has blue eyes
*April 30, 2013 by Dave*

**Geometry**

Robert says that if you toss three coins you get 3H (#Heads), 2H (2 Heads), 1 H (1 Head), or OH ( 0Heads), so the probability of getting three heads is 1/4. How do you respond?
*January 13, 2011 by crystal*

**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.
*May 16, 2011 by Jon*

**math**

You have six coins. three of them are 25cents. what fraction of the coins are 25cents coins?
*November 25, 2012 by huxley*

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