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Popular >

20 nCr 2

Solution

20 nCr 2

Solution

190

Solution steps

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

Plug in

n = 20, r = 2

= \frac{20 !}{2 ! ( 20 - 2 ) !}

\frac{20 !}{2 ! ( 20 - 2 ) !} = 190

= 190

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Frequently Asked Questions (FAQ)

What is 20 nCr 2 ?
The answer to 20 nCr 2 is 190