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

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