An insurance company says that 15% of all fires are caused by arson. A random sample of five fire in


Question: An insurance company says that 15% of all fires are caused by arson. A random sample of five fire insurance claims are under study. Let r be the number of claims in this sample from fires that were started by arson.

(a) What is the expected number of arson fires among five fires?

(b) What is the standard deviation of r?

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