Условие:
16 apples are randomly put into 4 bags, 4 apples in each. 4 of 16 apples are rotten.\nA bag is chosen at random and an apple is selected at random from that bag.
(a) What is the probability that selected apple is rotten?
(b) What is the probability that the chosen bag contains at least one rotten apple?
(c) If the chosen apple is rotten what is the probability that the chosen bag contains two rotten\napples and two good ones?

