Question

A computer consulting firm presently has bids out on three projects. Let Ai = {awarded project i}, for i = 1, 2, 3, and suppose that P(A1) = .22, P(A2) = .25, P(A3) = .28, P(A1 intersection A2) = .11, P(A1 intersection A3) = .05, P(A2 intersection A3) - .07, P(A1 intersection A2 intersection A3) = .01. What is the probability of each event?
***c. A1' andA'2 andA3
***d. (A1' and A'2) or A3

Answer 1

What confuses me the most for d. is I don't know how A1' and A'2 and A3 can be answered by solving (A1 or A2 or A3) - (A1 or A2). I guess a little more explaining will help.

Answer 2

I'm sorry I meant c.

Answer 3

I understand this becomes -> A3 - (A1 and A3) - (A2 and A3) + (A1 and A2 and A3)

Answer 4

for the solution, but looking at (A1' and A'2 and A3) I can't picture it from the ven diagram.

Answer 5

Any help would be great thanks.