21. Each of 20 balls is tossed independently and at random into one of 5 bins. Let p be the probability that some bin en
Posted: Mon Nov 15, 2021 10:16 am
21. Each of 20 balls is tossed independently and at random into one of 5 bins. Let p be the probability that some bin ends up with 3 balls, another with 5 balls, and the other three with 4 balls each. Let q be the probability that a every bin ends up with 4 balls. What is ? (A)T (B) 4 (C8 (D) 12 (E) 16