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How many different groups of 7 students can you create from a class of 20 students?

How many different results could there be for 10 political candidates running for the same office in the upcoming election?

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number different? 20!/7!13!

There can only be 10 different results, only one person can win

There can only be 10 different results, only one person can win.

how would i set this up?

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