Question

What is the sum of the probability of occurring an event E and the probability of not occurring the event E?

(a) 0

(b) -1

(c) 1

(d) ∞

The question was asked by my school teacher while I was bunking the class.

This key question is from Theoretical Approach to Probability topic in section Probability of Mathematics – Class 10

Answer 1

The correct option is (c) 1

To elaborate: Probability of occurring an event E = P(E)

Probability of not occurring the event E = P(E)

P(E) + P(E) = 1