# Poisson Process for demands for an item on a warehouse

Demands for an item are part of a poisson process and are made on a warehouse 3 times per day. What is the probability that on a given day this item is requested:

a) more than 4 times per day

b) more than 4 times in 3 days?

The professor gave the answers as:

a) 8.4%

b) 94.5%

.

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#### Solution Preview

mu = 3

(a) x = 4

P(x) = e^-mu * mu^x / x!

P(x > 4) = 1 - P(x <= 4) = 1 - [P(0) + P(1) + P(2) + P(3) + P(4)]

= 1 - ...

#### Solution Summary

The required probabilities are calculated.

$2.19