8.Suppose there were 4,065,014 births in a given year. Of those births, 2,081,28

Question

8.Suppose there were 4,065,014 births in a given year. Of those births, 2,081,287 were boys and 1,983,727 were girls.

a)If we randomly select two women from the population who then become pregnant, what is the probability both children will be boys?

b)If we randomly select two women from the population who then become pregnant, what is the probability that the first woman’s child will be a boy and the second woman’s child will be a boy?

c)If we randomly select two women from the population who then become pregnant, what is the probability that both children will be boys given that at least one child is a boy?

Explanation / Answer

probability both children will be boys =(2081287/4065014)*(2081286/4065013)=0.2621

b)probability both children will be boys =(2081287/4065014)*(2081286/4065013)=0.2621

c)probability that both children will be boys given that at least one child is a boy =(P(b1nb2)/P(b1Ub2) =

=P(b1nb2)/(1-P(b1nb2)) =(0.2621)/(1-0.2621)=0.3552

please check; i think there is something wrong in p[art a)

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