Mathematics, 22.10.2016 16:52 ajadegipson6784

# The number of messages sent to a computer bulletin board is a poisson random variable with a mean of 5 messages per hour.

(a) what is the probability that 5 messages are received in 1 hour?

(b) what is the probability that 10 messages are received in 1.5 hours?

(c) what is the probability that the time between two consecutive received messages exceeds 30 minutes?

(d) find the expected value and the standard deviation of the number of messages received daily.

Answers: 3

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Apublic library wants to place 4 magazines and 9 books on each display shelf. the expression 4s+9s represents the total number of items that will be displayed on s shelves. simplify the expression

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