19. In how many ways can 3 red marbles, 2 blue marbles, and 5 yellow marbles be placed in a row?
(A) 3!2!5!
(B)
12!
10!
(C)
10!
3!
10!
2!
10!
5!
(D)
10!
3!2!5!
(E)
10!
(3!2!5!)2
20. The retirement plan for a company allows employees to invest in 10 different mutual funds. Six of the
10 funds grew by at least 10% over the last year. If Sam randomly selected 4 of the 10 funds, what is
the probability that 3 of Sam’s 4 funds grew by at least 10% over last year?
(A) 6C3
10C4
(B) 6C34 C1
10C4
(C) 6C34 C1
10P4
(D) 6P34 P1
10C4
(E) 6P34 P1
10P4