Flaws occur randomly in a roll of fabric at an average rate of 1.5 per metre length.
Question:
Flaws occur randomly in a roll of fabric at an average rate of 1.5 per metre length.
(a) Find the probability that in a randomly chosen one-metre length there are more than two flaws.
(b) Find the probability that in a randomly. chosen two-metre length there are no flaws.
(c) What is the standard deviation of the number of flaws in a four-metre length?
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Muhammad Umair
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Related Book For 
A Concise Course In Advanced Level Statistics With Worked Examples
ISBN: 9780748754755
4th Edition
Authors: J. Crawshaw, J. Chambers
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