Question 477668
A) P(C and D) = P(C)*P(D) = 0.35*0.55 = 0.1925

B)P(D or C) = P(D) + P(C) - P(C and D) = 0.55 + 0.35 - 0.1925 = 0.7075

C) P(C) = P(C and D) + P(C and D') ==> 0.35 = 0.1925 + P(C and D')

==> P(C and D') = 0.1575.

D) P((C or D)') = 1 - P(C or D) = 1 - 0.7075 = 0.2925.