Question

Question: What is the probability of a flood equal to or greater than 25 years flood occurring twice in the next three years?

24/625

2) 72/3125

3)72/15625

4)24/15625
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Answer 1

Answer:

The term “1,000-year flood” means that, statistically speaking, a flood of that magnitude (or greater) has a 1 in 1,000 chance of occurring in any given year. In terms of probability, the 1,000-year flood has a 0.1% chance of happening in any given year. These statistical values are based on observed data.

Answer 2

Answer:

72/15625

Explanation:

Such a flood will occur, in an year, with a probability of 1/25. For this to happen exactly twice (and for this to not happen exactly once) in the next 3years the expression is 3C2*(1/25)*(1/25)*(24/25) which is 72/15625