Which of the following is not a valid probability distribution for a discrete random variable? Check all that apply.
A. 1/5,1/10,1/10,1/10,1/5,1/10,1/10, 1/10
B. 1/3,1/4,1/5,1/6
C. 1/2,1/4,1/8,1/16,1/32,1/64,1/128,1/128
D. - 1/2, - 1/3, - 1/4, - 1/5, 137/60
E. 1/6, 1/6, 1/6, 1/6, 1/6, 1/6
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