Question

Which of the following are not valid probability distributions for a discrete random variable?

Check all that apply.

A.) 1/2, 1/4, 1/8, 1/16, 1/32, 1/64, 1/128, 1/128

B.) 1/3,1/4,1/5,1/6

C.) 1/6,1/6,1/6,1/6,1/6,1/6

D.) 1/5,1/10,1/10,1/10,1/5,1/10,1/10,1/10

E.) -1/2,-1/3,-1/4,-1/5,137/60