Posted by **Punkie** on Wednesday, November 18, 2009 at 5:32pm.

In a family with two children, what are the probabilities of the following outcomes, assuming that the birth of boys and girls is equally likely?

a. Both are boys.

b. The first is a girl and the second a boy.

c. Neither is a girl.

d. At least one is a girl.

I was wondering about the formula....

is a. P(probability) = 1/2(boy) + 1/2(boy)

P = 1/2 + 1/2

so P = 2/2

to me this doesn't seem right

- Math -
**bobpursley**, Wednesday, November 18, 2009 at 5:48pm
A) PR(B,B)=Pr(b)*Pr(b)=1/2*1/2

B) Pr(g)Pr(b)=1/2*1/2

C) you can get at least one girl these ways:

gb

bg

gg

Pr(at least one g)= 1/2*1/2*3

- Math -
**Punkie**, Wednesday, November 18, 2009 at 5:50pm
Thank you for answering my question.

Why do you multiply the probability of both boys, girl and boy, etc?

## Answer This Question

## Related Questions

- Math - in a family with two children, what are the probabilities of the ...
- Math - In a family with two children, what are the probabilities of the ...
- math - in a family with two children, what are the probabilities of two boys, ...
- Statistics - In planning a family of 4 children assume boys and girls are ...
- statistic - The random variable x represents the number of boys in a family with...
- statistic - Three Children – A couple are planning to have 3 children. What is ...
- math - Suppose that China’s population policy is modified so that every family ...
- Statistics - Survey of 115 families chosen at random, having 5 children it was ...
- statistics - assuming that boys and girls are equally likely, estimate the ...
- check math - If boys ad girls are equally likely to be born, what is the ...

More Related Questions