A garment manufacturer knows that the number of flaws per square yard in a particular type of cloth that he purchases varies with an average of 1.3 flaws per square yard. The count X of flaws per square yard can be modelled by a Poisson distribution. Find the probability that in the a randomly selected yard of cloth, exactly 4 flaws will be found, P(X=4). (Correct to three decimal places)

Guest Apr 6, 2017

With Poisson distribution, P(x) = e-mumux/x!


Here:  mu = 1.3, x = 4, so P(4) ≈ 0.032


Alan  Apr 6, 2017

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