What is the probability for a family with four children to have a boy and three girls (assuming the probability of having a boy or a girl is equal)?  Choose one.
A) 1/2	B) 1/3	C) 1/4	D) 1/8	E) 1/16
One possible case is: girl - girl - girl - boy   The probability of this is 1/2*1/2*1/2*1/2 = 1/16   There are 4C3 = 4 such cases so we should multiply by 4.   P(one boy and three girls) = 4/16 = 1/4   The answer is 1/4.
<result>C</result>
What is the probability for a family with four children to have a boy and three girls (assuming the probability of having a boy or a girl is equal)?