Question

in a certain country, the true probability of a baby being a girl is 0.464. Among the next nine randomly selected births in the country, what is the probability that at least one of them is a boy?

Answer 1

Solution:

Given:

P(Girl) =0.464

n =  randomly selected births in the country = 9

We have to find:

the probability that at least one of them is a boy.

P( At least one boy) = ..............?

P( At least one boy) = 1 - P( None of them are Boys)

P( At least one boy) = 1 - P( all 9 births are Girls )

P( At least one boy) = 1 - 0.464⁹

P( At least one boy) = 1 - 0.0009969

P( At least one boy) = 0.9990031

P( At least one boy) = 0.9990