In a certain city, 5% of all the persons in town have unlisted phone numbers. If you select 100 names at random from that city's phone directory, how many people selected will have unlisted phone numbers?

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In a certain city, 5% of all the persons in town have unlisted phone numbers. If you select 100 names at random from that city's phone directory, how many people selected will have unlisted phone numbers?

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JackTerrance · Answer 1 · 2021-02-12T10:43:02+0000

Zero. You are selecting names from the list, so they are all listed.