Evaluate the following: 7C3?

NetherCraft 0

I am not good at math and I am struggling with stats –

I don’t understand how to approach this question.

Evaluate the following: 7C3.

A)   210

B)   5,040

C)   35

D)   6

2 Answers

  • You need the Combination Formula. That’s what the C stands for. This formula is used when

    the order of the selected objects is not important.

    In general, nCr = n! / r! (n-r)!

    Here, 7C3 = 7! / 3!(7-3)!

    =7 x 6 x 5 x 4 x 3 x 2 x 1 /3 x 2 x 1 ( 4 x 3 x 2 x 1)

    =7x6x5x4 / 4x3x2

    =7x5x6x4 / 24

    =35×24 / 24

    =35

    Answer is C

  • 7P6=

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