00:01
So we need to prove the probability of a being less than or equal to 2.
00:07
First of all, we must write a as, that a can be written as, a intersection b union a dash.
00:21
Now a dash is a complement of b.
00:30
But a and b are equals, which can be also written as, a b union a b dash.
00:37
If b is a complement, a b dash is a complement, we can write the union.
00:40
So we can write a b union a b dash prime.
00:48
Which is supposed to be a justification.
00:51
We are not writing this, so we can take up the probability.
00:55
Probability of a being less than or equal to 2.
00:58
A b union a b prime.
01:06
And which can be written as, probability of a b plus probability of a b prime minus probability of a b...