SOLUTION: How many different groups of 3 students can be formed if there are 20 students in the class?

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Question 699615: How many different groups of 3 students can be formed if there are 20 students in the class?
Answer by solver91311(24713) About Me  (Show Source):
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That depends. Does order matter? Is a group that consists of Sally, Billy, and Najib the same or different than a group that consists of Billy, Najib, and Sally?

John

Egw to Beta kai to Sigma
My calculator said it, I believe it, that settles it
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