SOLUTION: For each of the following, determine whether it can serve as the probability distribution of a random variable X. 1. P(X) = 1/8 for x= 1,2,3,4.....,8 2. P(X) = 1/6

Question 1192184: For each of the following, determine whether it can serve as the probability distribution of a random variable X.
1. P(X) = 1/8 for x= 1,2,3,4.....,8
2. P(X) = 1/6 for x= 1,2,3,......,9
3. P(X) = 3+×/3-× for x= 1,2,3,4
4. P(X) = 12/25x for x=1,2,3,4,5
Answer by ikleyn(52777) (Show Source): You can put this solution on YOUR website!
.

If the probabilities for all given values of x are all defined, all are non-negative and sum up to 1.0, then the answer is positive;
if not, then the answer is negative.

Having this key comprehensive instruction, you do the rest.

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