People enter a line for the Demon Roller Coaster at the rate of 4 per minute. The

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People enter a line for the Demon Roller Coaster at the rate of 4 per minute. The following formula from probability can be used to determine the probability that x people will arrive within the next minute.

4*e 4 Р(х) х!


where

x! = x• (x – 1)·(x – 2) …3·2·1 3.2.1


(a) Determine the probability that x = 5 people will arrive within the next minute.

(b) Determine the probability that x = 8 people will arrive within the next minute.

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Precalculus

ISBN: 978-0321716835

9th edition

Authors: Michael Sullivan

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