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Popular >

21 choose 3

Solution

21C3

Solution

1330

Solution steps

= \frac{n !}{r ! ( n - r ) !}

Plug in

n = 21, r = 3

= \frac{21 !}{3 ! ( 21 - 3 ) !}

\frac{21 !}{3 ! ( 21 - 3 ) !} = 1330

= 1330

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Frequently Asked Questions (FAQ)

What is 21 choose 3 ?
The answer to 21 choose 3 is 1330