I was doing this question using conditional probability formula.... i.e P(2/1)=? Probability of 2nd child to be boy given that 1st child is a boy. By formula, P(2/1)=P(2,1)/P(1) which is equal to P(2).P(1)/P(1)...since second child to be boy doesn't depend on first child and vice versa. So independent..Please provide the detailed solution and correct me if I am wrong.
P(2,1)= probability of 2nd and 1st child both to be boys.