00:01
In this question, we are given that the probability of the american blacks is 20%, so that is actually 0 .2 in decimal.
00:11
We're given this table below of the blood type, a, b, a, b, and o.
00:17
And these are caucasians and american blacks.
00:22
So the probability here, 0 .352 means a person is caucasian and having blood type a, the probability is 0 .352.
00:33
Now the question is are the events blood group a, that means over here, and caucasian race, that means over here, are they independent events? so let c be the event, caucasian race.
00:56
So we can see that the probability of c will be taking one minus the american blacks, which is 0 .2, and that will be 0 .8.
01:08
And let's a, be the event blood group a.
01:21
You can see that the probability of a is actually over here...