(a) P(H or G) = P(H) + P(G) - P(H and G) = 0.25 + 0.45 - 0.19. ANSWER You complete calculations. (b) P = 1 - P(H and G) = 1 - 0.19. ANSWER You complete calculations. (c) It is the difference 1 and the probability you found/calculated in n a). Compute it on your own.