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

Option B and D are correct.

Step-by-step explanation:

We know that Sum of the probability distribution of a discrete random variable is equal to 1.

using this result we check which is not valid probability distribution.

Option A).

Sum of Probability Distribution

So, This is valid Probability distribution.

Option B).

Sum of Probability Distribution

So, This is not a valid Probability distribution.

Option C).

Sum of Probability Distribution

So, This is valid Probability distribution.

Option D).

Given Probability Distribution has negative probability which is not possible.

So, This is not a valid Probability distribution.

Option E).

Sum of Probability Distribution

So, This is valid Probability distribution.

Therefore, Option B and D are correct.

hello from mrbilldoesmath!

answer:

x - 3

discussion:

x^2 - 9 = (x-3) (x+3)   so

(x^2-9)/ (x + 3) = x-3

you,

mrb

51-50

step-by-step explanation: