Question

The probability of occurring an event is 0.45. Find the probability of not occurring the event.

(a) 0.5

(b) 0.45

(c) 0.55

(d) 0.1

This question was addressed to me in an international level competition.

This interesting question is from Theoretical Approach to Probability in division Probability of Mathematics – Class 10

Answer 1

Correct choice is (c) 0.55

Best explanation: The probability of occurring an event be P(E) = 0.45

The probability of not occurring the event = P(E)

P(E) + P(E) = 1

0.45 + P(E) = 1

P(E) = 0.55