Permutations And Combinations

Match the items on the right to the items on the left.

{}^{n}C_{0}

{}^{n}C_{1} = {}^{n}C_{n - 1}

{}^{n}C_{r}

{}^{n}C_{r} + {}^{n}C_{r - 1}

{}^{n}C_{n}

{}^{n}C_{n - r}

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