Duplicate of The Basic Counting Principal, Probability and Odds Flashcards | StudBud

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Home Library Explore SAT

Duplicate of The Basic Counting Principal, Probability and Odds Flashcards | StudBud

Duplicate of The Basic Counting Principal, Probability and Odds

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Question

I have to pick 2 students to represent 20 students, how many ways can I select 2 students?

Answer

20 nCr 2

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