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An auto insurance company has 15,000 policyholders with comprehensive automobile coverage. In the past year, 11,425 filed no claims, 3,100 filed one claim, 385 filed

An auto insurance company has 15,000 policyholders with comprehensive automobile coverage. In the past year, 11,425 filed no claims, 3,100 filed one claim, 385 filed two claims, and 90 filed 3 claims.

(a) Calculate the mean and for the number of claims filed by a policyholder

(b) Calculate the standard deviation for the number of claims filed by a policyholder.

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