Competitive Quantitative Aptitude Permutation and Combination Permutation and Combination

Medium

$\binom{n}{n-r} + \binom{n}{r+1}$,whenever $0 \le r \le n-1$,is equal to

A
$\binom{n}{r-1}$
B
$\binom{n}{r}$
C
$\binom{n}{r+1}$
D
$\binom{n+1}{r+1}$

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Competitive Questions

Competitive

Quantitative Aptitude Questions

Chapter

Permutation and Combination

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Permutation and Combination

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