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In a telephone enquiry system, the numbe...

In a telephone enquiry system, the number of phone calls regarding relevant enquiry follow poisson distribution with an average of five phone calls during 10-minute time intervals. The probability that there is at the most one phone call during a 10-minute time period is

A

`6/5^(e)`

B

`5/6`

C

`6/55`

D

`6/e^(5)`

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The correct Answer is:
D
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