Which one of the following identities expresses the symmetry property of binomial…

MATHEMATICS · Single correct · A Level · Mathematics · Sequences and series · Sequences and series

Problem

Which one of the following identities expresses the symmetry property of binomial coefficients? (a)

\displaystyle {n \choose k+1}

(b)

\displaystyle {n \choose n-k}

(c)

\displaystyle {n+1 \choose k}

(d)

\displaystyle {k \choose n}