Question

Permutations:

What is the formula for calculating a permutation?

What is the formula for permutations with like objects?

What is the formula for permutations for objects arranged in a circle?

Answer 1

See below.

Explanation:

`\boxed{\text{PERMUTATIONS}}}`

Objects are arranged from last to first in "permutations". The order in which the objects are picked is extremely important.

Permutations of n objects taken r at a time = the first r factorials of n!

Formula of permutations:

`\Longrightarrow: \sf{_nP_r=n(n-1)(n-2).....(n-r+1)=(n!)/((n-r)!) }`

I hope this helps, let me know if you have any questions.

Answer 2

Permutation is considered an ordered combination. The general formula for this is:

P(n, r) = n! (n-r)!

where:
n=