Probability of a lO-year flood to occur at least once in the next 4 years is
A. 25% B. 35% C. 50% D. 65%
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it is simply
probablity in 10 years = 1
probablity in 4 years = 1 * 4/ 10 = 0.4 = 25 %
probablity in 10 years = 1
probablity in 4 years = 1 * 4/ 10 = 0.4 = 25 %
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