Alice and bill are planning to have three children. (assume that it is equally likely for a boy or a girl to be born.) what is the probability that all three of their children will be girls?

Step-by-step explanation:

Alice and Bill  are planning to have three children

We have to find the probability that all three of their children will be girl.

Sample space =S={BBB,BBG,BGB,GBB,GGG,GBG,GGB,BGG}

Total =8

Number of cases in which all three children are girls={GGG}

Probability,P(E)=

Using the formula

Then , the probability that all three of their children will be girls=

what is the original number? you forgot to add it.