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Mathematics 11 Online
OpenStudy (anonymous):

how many ways can 3 students be chosen from a class of 20 to represent there class?

OpenStudy (solomonzelman):

20 C 3

OpenStudy (solomonzelman):

( This is an nCr function )

OpenStudy (anonymous):

oh ok thanks

OpenStudy (solomonzelman):

You welcome !

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