they could all have the same name, nothing in your question excludes that as a possibility. You are assuming that we want to use all 150 names at least, but maybe we don't.

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25. law of averages says so :)

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How many people care if they have the same name<br />
And how many people in that crowd are me

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why does that matter?

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it is a question on averages. so it is estimating the number. for all you know only one name was used, of two names. I never said that all the names are used. you basically answer with an educated guess.

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