Question

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

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.

Math   Statistics-And-Probability   
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Homework Answers

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

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