The maximum rainfall depth of 300 mm in 24 hours has a return period of 100 years. The probability of 24 hours rainfall equal to or greater than 300 mm occurring at least once in 10 years is given by A)(0.99)¹⁰ B)1 - (0.99)¹⁰ C)(0.9)¹⁰⁰ D)l-(0.9)¹⁰⁰

Question

Quizplus · Accepted Answer

The probability of an event with a return period of 100 years occurring in any given year is 1/100 = 0.01. The probability of it not occurring in any given year is 1 - 0.01 = 0.99. The probability of it not occurring over 10 years is (0.99)^10. Therefore, the probability of the event occurring at least once in 10 years is 1 - (0.99)^10.

The Maximum Rainfall Depth of 300 Mm in 24 Hours