b) It is known that an average of 5 trains pass through Grand Central Terminal every 30 minutes. Find the probability that i. Exactly 4 trains will pass in 30 minutes ii. less than 2 trains will pass in an hour
b) It is known that an average of 5 trains pass through Grand Central Terminal every 30 minutes. Find the probability that i. Exactly 4 trains will pass in 30 minutes ii. less than 2 trains will pass in an hour
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Workings please
Transcribed Image Text:a)
Market research has shown that 60% of
persons who are introduced to a certain
product actually buy the product. A random
sample of 15 persons were introduced to the
product.
Transcribed Image Text:b)
It is known that an average of 5 trains
pass through Grand Central Terminal every 30
minutes. Find the probability that
i.
Exactly 4 trains will pass in 30
minutes
ii.
less than 2 trains will pass in an
hour
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