GATE2020-CE-1-18

Question

The probability that a $50$ year flood may $\textbf{NOT}$ occur at all during $25$ years life of a project (round off to two decimal places), is  _______.

Answer 1

Probability of occurrence of an event in 'n' Succesive years is given by : P=1- (q)^2

P =1/T        where T is time period

P =1-(1-1/50)^25

=0.396

Probability of non occurring =1-p

                                                  =1-0.396

                                                   =0.603