Question

In a family with two children, find the mean of the number of children who will be girls.

Group of answer choices

In a family with two children, find the mean of the number of children who will be girls.

Group of answer choices

A.1

B.

C.

D.

Answer 1

Solution:

We have a  family with two children, then sample space is:

S = { BB , BG, GB , GG }

B = Boy G = Girl

We have to find mean of  the number of children who will be girls.

Mean:

Thus probability distribution of number of girls is:

x	Outcomes	frequency	P(x)	x*P(x)
0	BB	1	1/4	0
1	BG, GB	2	2/4	0.5
2	GG	1	1/4	0.5

thus