Question

Children Suppose a family has two children and the youngest is a girl. What is the probability that both children are girls?

Answer 1

Since there are a total of two children in a family.

Then there are 4 possibilities:

1. Younger is a boy and elder is a boy, denoted as (BB)
2. Younger is a boy and elder is a girl, denoted by (BG)
3. Younger is a girl and elder is a boy, denoted by (GB)
4. Younger is a girl and elder is a girl, denoted by (GG)

Since we are already given that "Younger is a girl".

So, the total remaining possibilities are 2(which are GB & GG)

and favorable outcome = 1(which is only GG for getting both girls)

Thus,