Let n and r be non negative integers such that 1≤r≤n˙ Then, nCr=rn ˙ n−1Cr−1 ˙

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Let {n} {a}{n}{d} {r} be non negative integers such that {1}{r

Question

Let $n a n d r$ be non negative integers such that $1 \leq r \leq n ˙$ Then, $^{n} C_{r} = \frac{n}{r} ˙^{n - 1} C_{r - 1} ˙$

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Let

n a n d r

be non negative integers such that

1 \leq r \leq n ˙

Then,

^{n} C_{r} = \frac{n}{r} ˙^{n - 1} C_{r - 1} ˙

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Question Text

Let

n a n d r

be non negative integers such that

1 \leq r \leq n ˙

Then,

^{n} C_{r} = \frac{n}{r} ˙^{n - 1} C_{r - 1} ˙