00:02
In this question, it is given that a and b are two mutually exclusive events.
00:07
If a and b are two mutually exclusive events, it means probability of a intersection b will be 0 .6.
00:15
Along with this, it is given that probability of event a is 0 .25 and probability of event b is 0 .65.
00:28
It is given in the question.
00:30
Now we need to find the following probabilities.
00:32
First of all, we need to find probability of a intersection b.
00:37
And as we told that since a and we are two mutually exclusive events, then probability of a intersection b will be zero.
00:44
Next, we need to find probability of a union b.
00:48
So for a union b, what we can write, that probability of a plus probability of b minus probability of a intersection b.
00:57
So this can be written as probability of a is 0 .25, probability of b is 0 .65 and probability of a intersection b is 0 .5.
01:08
So basically from here we will be getting probability of a union b is equals to 0 .9.
01:15
This is the probability or we can say 0 .90.
01:18
This is the probability of a union b...