00:01
In this question, we're given a committee of three students formed.
00:04
I'm going to let x be the number of girls selected out of these three students.
00:08
So n, the number of trials, is three.
00:10
In each trial, we take a look at a person in this committee and whether it's a boy or a girl.
00:16
So these three trials are all identical, independent.
00:21
And there's only two possible outcomes, one or two possible outcomes in each trial, success or failure.
00:28
Now, success is a girl selected, failure is a girl is not selected.
00:32
And p, probability of success in a single trial, that's probability a girl is selected.
00:37
Now, let's assume that it will be probability half...