00:01
All right.
00:02
So for this question, we're given the following breakdown of a sample of 1 ,000 adults as to whether or not they have emails.
00:09
Yes, being they do have one, no being they don't.
00:11
For males and females, and we're given the following information.
00:14
So first, let's just follow our total column in row.
00:17
500 plus 100, 600, 250 plus 150 is 400.
00:23
These summed to 1 ,000.
00:24
So that checks out.
00:25
This is 750.
00:27
This is 250, also that to 1 ,000, which also checks out.
00:31
So it seems like the person who submitted this question already had these answers, but we're just going to go through them just to be sure.
00:39
So the probability that a person has an email account is just equal to this total one out of 750, the total number of people who have one divided by the total number of people.
00:49
It gives 750 out of 1 ,000 or 3 fourths or in decimal form .75.
00:57
Probability of the person is female, we do this much the same way.
01:00
You get 200 out of 1 ,000, this one divided by the total.
01:09
This is equal to two -fifths or 0 .4 in decimal form.
01:15
Probability that a person does not have one given that they're male.
01:19
Now we need to do, we need to find their intersection and divided by the condition...