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The probability that you receive at least one phone call during two hours is 0.97. If...

The probability that you receive at least one phone call during two hours is 0.97. If number of calls X follows Poisson distribution a)what is probability that 2 or more phone calls will be received during 3h period? b)Find the number of calls N during three hours period such that P{X= N} ≥ P{X = k} for all k from 0 to ∞

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