00:01
Now here on this problem, we have a probability problem.
00:03
And we're going to take a name from list one, add it to list two, and then finds a probability.
00:10
We'll find the probability that given that the name is a man, we want to find the probability that it was originally selected from list.
00:18
Find the probability that a woman's name was originally selected from list one.
00:23
So we want the probability of a woman in one, given that we chose a man on two.
00:29
Now, let's make a tree diagram with this.
00:33
The name we picked on list one, one could be a man or a woman.
00:39
Now, list one contains five women and two men.
00:42
And so there's a two out of seven chance that we choose a man from it.
00:47
And a five out of seven chance which is a woman.
00:52
Now we choose from list two, and it could be a man or a woman...