In any given year, the probability of an earthquake greater than Magnitude 6 occurring in the Garhwal Himalayas is $0.04 .$ The average time between successive occurrences of such earthquakes is $\quad$ years.

In any given year, the probability of an earthquake greater than Magnitude 6 occurring in the Garhwal Himalayas is $0.04 .$ The average time between successive occurrences of such earthquakes is $\quad$ years.

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