Question

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

Answer 1

P(boy) = 0.531

P(girl) = 1 - 0.531 = 0.469

n = 6

P(at leat one of them is a girl) = 1 - P(none of them are girl)

                                                = 1 - P(all 6 are boys)

                                                = 1 - 0.531⁶

                                                = 0.9776