A certain brand of copper wire has flaws about every 40 centimeters. Model the locations of the flaws as a Poisson process. What is the probability of two flaws in 1 meter of wire?
2. Let X be a Poisson random variable with parameter µ
a. Compute E[X(X − 1)].
b. Compute Var(X), using that Var(X) = E[X(X − 1)] + E[X] − (E[X])2
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