Question
If boys and girls are equally likely to be born, what is the probability that in a randomly selected family of 8 children, there will be at least one boy? (Find the answer using a formula. Give your answer correct to three decimal places.)
Answers
Kuai
P( at least one boy) = 1-p(all girls)
1-(1/2)^ 8
1-1/256
(256-1)/256
= 255/256
= 0.996