SOLUTION: Assume that the probability is 1/2 that a child born is a boy. What is the probability that of four children in a family two are girls and two are boys.

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Question 1184815: Assume that the probability is 1/2 that a child born is a boy. What is the probability that of four children in a family two are girls and two are boys.
Answer by ikleyn(52800)   (Show Source): You can put this solution on YOUR website!
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Assume that the probability is 1/2 that a child born is a boy.
What is the probability that of four children in a family two are girls and two are boys.
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It is a typical and a classic Binomial distribution problem.


The number of trials n= 4; the probability of the success trial is  ,  and the number of success trials k = 2. 


    P =  =  =  = 0.375.     ANSWER

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To see many other similar  (and different)  solved problems,  look into the lessons
    - Simple and simplest probability problems on Binomial distribution
    - Typical binomial distribution probability problems
in this site.



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