19. The probability that Jose shopping for himself will buy a tie is 0.2, the probability that he will buy a shirt is 0.3, and the probability that he will buy a tie given that he buys a shirt is 0.4. Find the probability that he will buy (a) both a shirt and a tie. shirt = c shirtttic = (b) a shirt, a tie, or both. P CS ) + PCT ) + PC Both 0 . 3 0 . 2 0 .4 10. 9 (c) a shirt, given that he buys a tie