Let X be the number of anomalies that occur in the material of a particular region of an aircraft gas turbine disk. There is an average value of 3 anomalies per region. a) What is the probability of finding maximum 4 anomalies in a region? b) What is the probability of finding at least 2 anomalies in a region? c) Find the expected value of the probability distribution E(x) and the standard deviation σ

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