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On a certain TV channel, 18% of commercials are local advertisers. A sample of 120 commercials is selected. A. What is the probability that more

On a certain TV channel, 18% of commercials are local advertisers. A sample of 120 commercials is selected.

A. What is the probability that more than 20% of the commercials in the sample are local advertisers?

B. Would it be unusual for more than 25% of the commercials to be local advertisers?

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