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If the number of calls received by a help-desk per minute follows a Poisson distribution with mean 2, the probability that no call is recei…

1769Medium DSSSB TGT Computer Science 0 replies 1 views

If the number of calls received by a help-desk per minute follows a Poisson distribution with mean 2, the probability that no call is received in a given minute is

A2e⁻²
Be⁻²
C1 − e⁻²
D0.5

Correct answer: B

Explanation

For a Poisson distribution P(X = 0) = e^(−λ) λ⁰/0! = e⁻² when λ = 2.

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