If a random variable X assume values x1, x2, x3, …, xn with the corresponding probabilities p1, p2, p3, …, pn. Then
P1 + P2 + P3 +…..+ Pn = 1
The sum of all the probabilities of all the events of an experiment is 1. If a random variable X assume values x1, x2, x3, …, xn with the corresponding probabilities p1, p2, p3, …, pn. Then P1 + P2 + P3 +…..+ Pn = 1