How many would we expect to be committed with a ?rearm

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According to a report, 72.6% of murders are committed with a ?rearm.

(a) If 400 murders are randomly selected, how many would we expect to be committed with a ?rearm?

(b) Would it be unusual to observe 311 murders by ?rearm in a random sample of 400 murders? Why?

Reference no: EM132847449

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