Question

In a certain country, the true probability of a baby being a boy is 0.531. Among the next mine randomly selected births in the country, what’s the probability that at least one of them is a girl?

Answer 1

The probability of a baby being a girl in the given country is 1 - 0.531 = 0.469.

The probability that none of the next nine babies are girls is:

P(9 boys) = (0.469)^9 = 0.0135

Therefore, the probability that at least one of the next nine babies is a girl is:

P(at least one girl) = 1 - P(9 boys) = 1 - 0.0135 = 0.9865

So, the probability that at least one of the next nine babies is a girl is approximately 0.9865.