00:01
Okay, i've gone ahead and organized a little bit of the data here.
00:05
It says in a statistic class there are 18 juniors and 10 seniors.
00:09
So that's going to go in my totals column here for those.
00:14
And it says six of the seniors are females.
00:17
That means six goes in the senior female box.
00:22
And 12 of the juniors are male, which means we go 12 in the male junior box.
00:26
From that, we can figure out the other two boxes.
00:29
This is going to have to be six because six plus 12 is 18.
00:34
This is going to have to be four because six plus four is 10.
00:38
That gives me the fact that there are 12 females and there are 16 males for a total of 28 students, which matches the 18 plus 10 equals 28.
00:51
Now we can know the following probabilities.
00:54
We want to know the probability of a junior or a female.
00:59
Probability of a junior or a female.
01:02
So i'm going to look at juniors, which is going to be here, and females, which is going to be here.
01:08
So it's going to be 18 juniors and 12 females.
01:12
However, we look at the sixes in both columns, so we need to, it means it was added in twice...