Question

In a family of 3 children, find probability of having at least one boy.

Answer 1

Answer:

Step-by-step explanation:

At least means not less than.

Hence we want the probability of getting not less than one boy.

This is :

P(one boy) or P(a boy and a boy ) or P(a boy and a boy and a boy)

1/3 + (1/3 × 1/3) + (1/3 × 1/3 × 1/3)

= 1/3 + 1/9 + 1/27 = 13/27

= 13/27

Answer 2

Answer:


Step-by-step explanation:


At least means not less than.


Hence we want the probability of getting not less than one boy.


This is :


P(one boy) or P(a boy and a boy ) or P(a boy and a boy and a boy)


1/3 + (1/3 × 1/3) + (1/3 × 1/3 × 1/3)


= 1/3 + 1/9 + 1/27 = 13/27


= 13/27