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

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

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

where:
n=

Answer 2

Answer:

See below.

Step-by-step 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:

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

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