If X and Y are random variables,the sum of all the conditional probabilities of X given a specific value of Y will always be:
A)the average of the possible values of X.
B)the average of the possible values of Y.
C)1.
D)0.

Question

Quizplus · Accepted Answer

The sum of all conditional probabilities of X given a specific value of Y is equal to the marginal probability of X, which sums to 1 by the definition of probability. Therefore, the correct answer is C.

If X and Y Are Random Variables,the Sum of All