Question

Which of the following is the definition for permutation?

Answer 1

The answer is D. Selections of objects in which the order of the objects matters.

Explanation:

Permutation is an arrangement of all or part of a set of objects, with regard to the order of the arrangement.

The formula for permutation: A permutation is the choice of (r) things from a set of (n) things without replacement and where the order matters. Formula-

`nPr= (n!)/((n-r)!)`

Permutation can be classified in three different categories:

• Permutation of (n) different objects (when repetition is not allowed)

• Repetition, where repetition is allowed

• Permutation when the objects are not distinct (Permutation of multi sets)