Question

In any given year, the probability of an earthquake greater than magnitude 6 occuring in the Garhwal Himalayas is 0.04. The average time between successive occurance of such earthquake in years.

• A. 25

Answer 1

The correct option is A 25
$GivenP=0.04=\frac{4}{100}=\frac{1}{25}\text{/year}$

i.e., chance of getting an earthquake in a year
$=\frac{1}{25}$

So average waiting time = 25 years.