00:01
Hello students in this question a study by peter d.
00:04
Hart research associates for the nasdaq stock market revealed that 43 % of all american adults are stockholders.
00:15
That means a.
00:19
American adults are stockholders.
00:31
That is, p of a equal to 0 .43.
00:36
3 and let b denote american adults have some college education and it is given that probability of b equal to 0 .39 and also probability of college education given stockholders that probability of b given a is equal to 0 .75.
01:30
And in the first question, it is asked, what is the probability that the adult owns stocks and has some college education? that is, probability of the own stock, that is a, and has some college education.
01:48
That is, probability of b given a, into probability of a, that is 0 .75 into 0 .43, that is equal to 0 .0675.
02:16
And in the second question, what is the probability that the adult owns no stock and has some college education? that is, he has college education and does not own stock.
02:30
That means a complement that is equal to probability of b minus probability of a intersection b that is 0 .39 minus 0 .325 that is equal to 0 .0675 and in the third question probability that the adult won't stalks and has no college education that is he owns stock and has no college education.
03:17
So, probability of a minus probability of a intersection b...