Permutations And Combinations

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

The total number of permutations on a set of n distinct objects

The total number of permutations on a set of n objects taken r at a time

The number of ways of arranging n objects of which r are the same

The number of permutations of n distinct objects when a particular object is not to be considered in the arrangement

The number of permutations of n distinct objects when a specific object is to be always included in the arrangement

{}^{n}P_{n}

{}^{n}P_{r}

\frac{n!}{r!}

{}^{n - 1}P_{r}

r . {}^{n - 1}P_{r - 1}