If and , find the ordered pair…

MATHEMATICS · Single correct · CBSE · Mathematics · Binomial Theorem · Binomial Theorem

Problem

If

{}^{n}C_{r}=210

and

{}^{n}C_{r+1}=252

, find the ordered pair

(n, r)

. (a)

(10,6)

(b)

(10,5)

(c)

(10,4)

(d)

(21,2)

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