. Let A denote the event that the next request for assistance from a statistical software consultant relates to the SPSS package, and let B be the event that the next request is for help with SAS....

. Let A denote the event that the next request for assistance from a statistical software consultant

relates to the SPSS package, and let B be the event that the next request is for help with SAS.

Suppose that P(A) ¼ .30 and P(B) ¼ .50.

(a) Why is it not the case that P(A) + P(B) ¼ 1?

(b) Calculate P(A0).

(c) Calculate P(A [ B).

(d) Calculate P(A0 \ B0).