Question: Based on past experience, it is assumed that the number of flaws per metre in rolls of grade 2 paper follow a Poisson distribution with

Based on past experience, it is assumed that the number of flaws per metre in rolls of grade 2 paper follow a Poisson distribution with a mean of one flaw per 5 metres of paper.

What is the probability that in a:

a. 1-metre roll there will be at least two flaws?

b. 10-metre roll there will be at least one flaw?

c. 50-metre roll there will be between five and 15 (inclusive)

flaws?

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