Question

The ratio of boys to girls at birth in singapore is 1.09:1 then the proportion of singaporean families with exactly 6 children who will have at least 3 boys is

Answer 1

SOLUTION :-
1.09:1::2:1

Answer 2

Thank you for asking this question. Here is your answer:

The ratio of boys to girls at birth in a country is quite high at 1.09:1

P(having a boy) = 1.09/(1+1.09) = 0.5215

Binomial Problem with n = 6

P(3<= x <=6) = 1 - P(0<= x <=2) = 1 - binomial (6,0.5215,2) = 0.6957

If there is any confusion please leave comment below.