How do you evaluate 6C4?

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How do you evaluate 6C4?

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Answer 1 · 2016-10-15T11:10:42

$6 C_{4} = 15$ $6C_4 =15$

Explanation:

$n C_{r} = \frac{n!}{(n - r)! \cdot r!} ∴ 6 C_{4} = \frac{6!}{(6 - 4)! \cdot 4!} = \frac{6 \cdot 5 \cdot 4 \cdot 3 \cdot 2 \cdot 1}{2 \cdot 1 \cdot 4 \cdot 3 \cdot 2 \cdot 1} = 15 [A n s]$ $n C_r = (n!)/((n-r)!*r!) :. 6C_4 =(6!)/((6-4)!*4!)=(6*5*4*3*2*1)/(2*1*4*3*2*1)=15 [Ans]$

Answer 2 · 2017-12-09T03:34:22

This question requires a basic understanding of how to manipulate factorials.

Answer:

$^{6} C_{4} = 15$ $""^6 C_4=15$

Explanation:

Please refer to my video below :)

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How do you evaluate 6C4?

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