Thursday

February 23, 2017
Number of results: 160,438

**math**

Three coins are tossed. Find the probability that no more than one coin lands heads up.

*November 19, 2009 by shree*

**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**

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 ...

*April 13, 2010 by nicole*

**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*

**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**

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**

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*

**probability**

urgent till 3 pm i have in colombia¡ 1 Alice has five coins in a bag: two coins are normal (i.e., fair with one face Heads and the other face Tails), two are double-headed (i.e., both sides are Heads), and the last one is double-tailed (i.e., both sides are Tails). She ...

*March 11, 2014 by Sakura1*

**Probability**

Alice has five coins in a bag: two coins are normal (i.e., fair with one face Heads and the other face Tails), two are double-headed (i.e., both sides are Heads), and the last one is double-tailed (i.e., both sides are Tails). She reaches into the bag and randomly pulls out a ...

*March 7, 2014 by qwerty*

**math**

a fair coin is tossed in the air 4 times. if the coin lands heads up the first three tosses, what is the probability the coin will land heads up the fourth toss? I think it is 1/2 because the coin has 2 sides and 50% it will land on heads. My friend thinks it is 1/16, since ...

*May 12, 2013 by Ellie*

**statistics**

An unfair coin has a probability of coming up heads of 0.55 the coin is tossed 4 times. What is the probability that it lands heads at least once?

*October 17, 2016 by gio*

**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**

an unbiased coin is tossed 3 times. find the probability that the coin lands heads exactly once.

*February 27, 2011 by Anonymous*

**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*

**math**

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

*May 30, 2007 by Angela*

**Prealgebra/probability**

A coin is tossed three times. Use a tree diagram to find the number of possible outcomes that could produce exactly two heads. I don't know how to write out a tree diagram on here, but I think this one is heads -> heads, tails -> heads, heads -> tails? A quarter and a...

*July 3, 2016 by Fawn*

**probability**

Adefective coin minting machineproducescoinswhoseprobability ofheadsisarandomvariable P with PDF 1+sin(2πp), if p ∈ [0,1],fP (p)= 0, otherwise. Inessence,aspecificcoinproducedby thismachinewillhavea fixedprobability P = p of giving heads, but you do not know ...

*November 8, 2015 by Anonymous*

**Math**

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

*March 2, 2014 by Renee*

**Math**

Olivia tossed two fair two-sided coins. In a game, she earns 4 points if exactly one coin lands on heads and 6 points if both coins land on heads. If points are not earned for tails, what is the expected value of the points earned? A. 3 1/3 B. 3 1/2 *** C. 5 D. 6

*January 28, 2016 by Chrisley*

**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**

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*

**probability**

Tossing a pair of coins We have a white coin, for which P(Heads)=0.4 and a black coin for which P(Heads)=0.6. The flips of the same or of different coins are independent. For each of the following situations, determine whether the random variable N can be approximated by a ...

*April 11, 2015 by RVE*

**maths**

Suppose there are 10 coins laid out in front of you. All of the coins are fair (i.e. have an equal chance of heads or tails) except one, which flips to heads every time. You draw one coin at random and flip it 5 times. If each of the 5 flips results in heads, then the ...

*March 26, 2013 by sana*

**Math**

Suppose you have a coin that lands on Heads with probability 0.6 There are three coin flips defined as X. Heads count 1 and tails count 0 – e.g., if three heads then X= 3; if a head and two tails then X = 1; if three tails the X = 0. What is the expected value of X? I'm ...

*September 11, 2016 by Marc*

**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 ...

*February 5, 2010 by Paul*

**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*

**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**

John has 2 coins, one fair and the other unbalanced so that the probability of its coming up heads is 2/3. He picks one of the coins at random, tosses it, and it comes up heads. What is the probability that he picked the unbalanced coin?

*July 7, 2013 by Annonymous*

**maths(pls help me)**

A fair coin is tossed 400 times.Use the normal-curve approximation to find the probability of obtaining: a.Between 185 and 210 heads inclusive. b.Exactly 205 heads. c.less than 176 or more than 227 heads.

*May 14, 2016 by farahan*

**Probability**

A defective coin minting machine produces coins whose probability of Heads is a random variable Q with PDF fQ(q)={3q2,0,if q∈[0,1],otherwise. A coin produced by this machine is tossed repeatedly, with successive tosses assumed to be independent. Let A be the event that ...

*April 2, 2014 by A*

**MATHS**

Three fair coins are tossed at the same time. What is the probability that one of the coins will show heads and other two will show tails?

*September 23, 2014 by Bryan*

**MATHS**

Three fair coins are tossed at the same time. What is the probability that one of the coins will show heads and other two will show tails?

*September 24, 2014 by BRYAN*

**prob and stats**

A coin is weighted so that the probability of obtaining a head in a single toss is 0.37. If the coin is tossed 27 times, find the following probabilities. Round your standard normal variable to two decimal places before using the table of values. (Give your answers to four ...

*October 15, 2010 by br0Ok3*

**Math (statistics)**

The probability of obtaining heads on a biased coin is 0.4. The coin is tossed 600 times. a. i. Write down the mean number of heads (240) ii. Find the standard deviation of the number of heads (12) b. Find the probability that the number of heads obtained is less than one ...

*March 16, 2016 by Myra*

**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**

1st question: Which events are not independent? You toss three coins and get one head and one tail. You choose three different ice toppings for a sundae. You draw to colored pencils without replacement and get one red and yellow. You pull a yellow marble from a bag of marbles...

*May 18, 2016 by Maddie*

**Math**

1st question: Which events are not independent? You toss three coins and get one head and one tail. You choose three different ice toppings for a sundae. You draw to colored pencils without replacement and get one red and yellow. You pull a yellow marble from a bag of marbles...

*May 18, 2016 by Anna*

**Math**

A biased coin is tossed 3 times. The probability that the coin will land on heads is 0.6 The probability that the coin will land on tails three times is less than 0.1 Is this correct? Show all your working.

*April 23, 2016 by Geny*

**Probability**

You toss a fair coin four times. Find the probability of no more than three heads given that at least one toss resulted in heads. Thank you very much!!

*January 27, 2012 by Erica*

**Stat.**

A trick coin has been weighted so that heads occurs with a probability of p 2 3, and p(tails) 1 3. If you toss this coin 72 times, a. How many heads would you expect to get on average? b. What is the probability of getting more than 50 heads? c. What is the probability...

*January 27, 2013 by Nickie*

**statistics**

A coin is tossed 3 times. Find the probability that all the 3 are heads (A) if it is known that the first is heads (B) if it is known that the first 2 are heads (C) if it is known that the 2 of them are heads

*February 7, 2015 by Joseph*

**math**

A coin is tossed 3 times. Find the probability that all the 3 are heads (A) if it is known that the first is heads (B) if it is known that the first 2 are heads (C) if it is known that the 2 of them are heads

*February 7, 2015 by Joseph*

**Statistics**

A loaded coin is tossed 5 times, find the probability distribution for the number of heads, if heads are thrice likely to occur than tails. Let x be the number of heads that will turn up. Compute the probability associated to each value of X using the equation: x=0,1,2,3,4,5 P...

*July 25, 2011 by Sapphire*

**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*

**Finite Math**

John has three coins in his pocket. One is fair, one has two heads, and the third is unbalanced, showing head 60% of the time. John grabs a coin at random and tosses it. Find the probability that: 1) The coin shows a head 2) The coin is regular, give that the toss produced a ...

*July 21, 2012 by Preet*

**finite math**

Suppose a coin is tossed 100 times 57 heads and 43 tails what is the probability the next one will be heads.

*June 17, 2014 by carol*

**arithmetic**

Assume you have an unfair coin - the one that lands heads with probability P (not known beforehand). You have rolled such a coin 20 times and got 16 heads and 4 tails. What is the best estimator of P, Pˆ? (Hint: it is the one based on sample mean.)

*June 1, 2013 by Anonymous*

**math**

Luis draws 1 card from a deck, 39 times. Predict how many times he draws an ace. John and O'Neal are playing a board game in which they roll two number cubes. John needs to get a sum of 8 on the number cubes to win. O'Neal needs a sum of 11, if they take turns rolling the ...

*March 14, 2016 by Anonymous*

**Probability**

The probability that it will take 5 or more flips of a fair coin before it lands on heads can be written as a/b , where a and b are coprime positive integers. Find a+b

*March 12, 2013 by John*

**math**

1. what is the probability of getting exactly one heads from three coin tosses? is the answer 1/8? 2. what is the probability that a fair coin will land heads up three times in a row? is the answer 3/2?

*August 4, 2009 by jakkie j*

**algebra**

A coin is tossed 3 times. Find the probability of obtaining the following: a) heads on the first and last toss, and tails on the other toss b) at least 2 heads c) at most 2 heads

*July 7, 2013 by Eliza*

**CALC**

A biased coin whose chance of heads is 0.4 is tossed five times in a row. What is the probability that heads is tossed exactly 2 times? 20.2% 23.04% 36.8% 40.1% 45.6%

*November 27, 2012 by Leandra*

**statistics**

A coin is biased so that the probability of obtaining a head is 2/3. The coin is tossed four times. Find the probability of obtaining exactly two heads.

*June 21, 2016 by Laura*

**math-probability**

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

*April 19, 2010 by jennifer*

**Probability**

A balanced coin is tossed 8 times. What is the probability of getting exactly 2 heads given that there were at least 2 heads in the 8 tosses?

*January 17, 2010 by Leesa*

**Probability**

A balanced coin is tossed 8 times. What is the probability of getting exactly 2 heads given that there were at least 2 heads in the 8 tosses?

*January 17, 2010 by Leesa*

**Probability**

Alice has two coins. The probability of Heads for the first coin is 1/3, and the probability of Heads for the second is 2/3. Other than this difference, the coins are indistinguishable. Alice chooses one of the coins at random and sends it to Bob. The random selection used by ...

*April 2, 2014 by A*

**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**

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**

A bag contains 8 blue coins and 6 red coins. A coin is removed at random and replaced by three of the other color. a) What is the probability that the removed coin is blue? b) If the coin removed is blue, what is the probability of drawing a red coin after three red coins are ...

*February 2, 2016 by kimie*

**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*

**Probability**

A coin is tossed 7 times. What is the probability of getting four heads. My teacher said that there is a formula involved but i don't know which one. How do i set it up?

*November 19, 2009 by nick*

**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**

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

*January 31, 2010 by Charles*

**math**

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

*April 20, 2010 by crystal*

**math**

francisco tossed the coin 10 more times. he got 5 heads and 5 tails. now what i his exrimental probability of getting heads? Wouldn't it depend on the tosses before? 50/50 with each flip. It has no revalence what the last flip or flips were.

*May 11, 2007 by brianna*

**Maths**

Q jar contains 3 red balls and 2 green balls first q coin is tossed. If the coin lands heads a red ball is added to jar.if the coin lands tails a green ball is added to the jar.second a ball is selected from the jar what is the probability q red ball is chosen

*August 27, 2016 by Ashwini*

**math of investment**

Suppose the probability of a coin coming up heads is 2/5. The coin is tossed 4 times (the tosses are independent), and Jane will win $5 for each head. If all 4 tosses are heads, she will get $100 extra. She never loses money. a)what is the probability that Jane will win at ...

*March 20, 2010 by Anonymous*

**math**

The probability that it will take 5 or more flips of a fair coin before it lands on heads can be written as ab, where a and b are coprime positive integers. Find a+b.

*March 15, 2013 by ayan*

**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*

**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*

**probability**

You flip a fair coin (i.e., the probability of obtaining Heads is 1/2) three times. Assume that all sequences of coin flip results, of length 3, are equally likely. Determine the probability of each of the following events. {HHH}: 3 Heads incorrect {HTH}: the sequence Heads, ...

*February 7, 2014 by JuanPro*

**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*

**Probability**

We have k coins. The probability of Heads is the same for each coin and is the realized value q of a random variable Q that is uniformly distributed on [0,1]. We assume that conditioned on Q=q, all coin tosses are independent. Let Ti be the number of tosses of the ith coin ...

*April 3, 2014 by A*

**Math**

Someone tossed a coin 80 times.The coin landed on heads 60 times. Is the experimental probability greater than or less than theoretical probability?

*March 19, 2013 by Taya*

**Math**

"The probability of getting heads on a biased coin is 1/3. Sammy tosses the coin 3 times. Find the probability of getting two heads and one tail". I thought that all you have to do is: (1/3)(1/3)(2/3) It makes sense to me, but it's not right...

*May 3, 2010 by Stuck*

**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*

**Geometry**

A coin of radius 1 cm is tossed onto a plane surface that has been tesselated by right triangles whose sides are 8 cm, 15 cm, and 17 cm long. What is the probability that the coin lands within one of the triangles?

*April 20, 2010 by Eunice*

**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*

**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*

**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*

**math/geometry pls help**

A coin of radius 1 cm is tossed onto a plane surface that has been tesselated by right triangles whose sides are 8 cm, 15 cm, and 17 cm long. What is the probability that the coin lands within one of the triangles?

*April 21, 2010 by Eunice*

**math**

A student claims that if a fair coin is tossed and comes up heads 5 times in a row, then, according to the law of averages, the probability of tails on the next toss is greater than the probability of heads. What is your reply? would this be the answer No matter what comes up ...

*April 21, 2010 by crystal*

**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*

**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*

**Probability**

4 fair coins are tossed. What is the probability that all the outcomes are heads?

*November 28, 2012 by Tina*

**Probability**

A coin is tossed 6 times. what is the probability of getting at least two heads?

*September 1, 2011 by FAKAAPO*

**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*

**Probability**

A coin is tossed 3 times. What is the probability of getting 2 heads and 1 tail?

*February 18, 2011 by Elizabeth*

**probability distribution**

A coin is biased such that a head is thrice as likely to occur as a tail. Find the probability distribution of heads and also find the mean and variance of the distribution when it is tossed 4 times. P(head) + P(tail) = 1 P(head) = 3 P(tail) Solving gives: P(head) = 3/4 If we ...

*January 18, 2007 by queen*

**LBCC**

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 7, 2013 by Lynn*

**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*

**Algebrad**

A six sided number cube is rolled and a coin is flipped. What is e probability that the number on the cube is less than 4 and the coin lands on heads? I think the answer might be 1/3. Heads and tails is 1 and less than 4 is 3. I am not sure.

*May 22, 2016 by Blake*

**Math**

Mother has P1 coin, P5 coins and P10 bill in her purse. In all, she has P112. She has two more P1 coin than P5 coins and one More P10 bills than P1 coins. How many of each kind does she have?

*February 10, 2016 by Raquel*

**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*