Question: Noted that: 1. in every year, at most only one natural disaster occurs 2. In every year, the probability that a natural disaster will occur

Noted that: 1. in every year, at most only one natural disaster occurs 2. In every year, the probability that a natural disaster will occur is 0.05 3. The number of natural disasters that occur each year is independent of each other

Determine the probability that in 20 years, natural disasters will occur less than 3 times. the answer is 0.92, please explain why??

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