Posted by Anonymous on Thursday, July 26, 2012 at 4:04pm.
Three fair quarters are tossed, and a tail appears on at least one of them. What is the probability that at least one head appears? Express your answer as a common fraction.

math  bobpursley, Thursday, July 26, 2012 at 5:12pm
For the other two, the probablilty of two tails is 1/2*1/2=1/4
Therefore, pr(at least one head)=11/4=3/4

math  Maddie, Tuesday, August 20, 2013 at 5:22pm
There are a total of eight possible outcomes for three coins: HHH, HHT, HTH, THH, TTH, THT! HTT, TTT. Out of these eight outcomes, seven of these show at least one tail (all except HHH). After counting, we find that six of these seven outcomes have at least one head, so the probability isâ€”6/7.

math  hahaha, Sunday, November 3, 2013 at 2:36pm
6/7
Answer This Question
Related Questions
 Algebra  Three quarters are tossed and a tail appears on at least one of them. ...
 Mathematics  Three quarters are tossed, and a tail appears on at least one of ...
 math  three fair coins are tossed. What is the probability that at least one is...
 algebra/check my answer  Three fair coins are tossed. What is the probability ...
 MATH  Write down the following events as sets and also write the corresponding ...
 math  A coin is tossed. If a head appears, a spinner that can land on any of ...
 math 7th grade  A coin is tossed. If a head appears, a spinner that can land on...
 common fraction  Sara tossed a fair coin five times, and Kaleb tossed a fair ...
 Statistics  A fair coin is tossed seven times. what is the probability of ...
 Math  A fair coin is tossed six times. Find the probability of getting head, ...
More Related Questions