Question

discrete probability distribution formula

Answer 1

When we say that the probability distribution of an experiment is discrete then the sum of probabilities of all possible values of the random variable must be equal to 1. That is if X is a discrete random variable, then,

∑eP(X=e)=1

Answer 2

When we say that the probability distribution of an experiment is discrete then the sum of probabilities of all possible values of the random variable must be equal to 1. That is if X is a discrete random variable, then,

$\sum _e P(X=e)=1$

Here, ‘e’ is the set of all values that the variable X can take.