Delhi averages three murder per week and their occurrences follow a Poisson distribution. On average, how many weeks a year can Delhi expect to have no murders?

Delhi averages three murder per week and their occurrences follow a Poisson distribution. On average, how many weeks a year can Delhi expect to have no murders? Correct Answer 2.6

P(0) = 0.0498. Hence average number of weeks per year with no murder is 52 x P(0) = 2.5889 week.
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