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)0.0
B)1.0
C)the average of the possible values of X.
D)the average of the possible values of Y.

Question

Quizplus · Accepted Answer

The sum of all the conditional probabilities of X given a specific value of Y must always equal 1. This is because, given a specific Y value, there is a 100% chance that X will have some value. Therefore, the sum of all the probabilities of X given Y must equal 1.

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