How to distinguish permutations from combinations

[Shafia Zahin]

Hello,
I face problems sometimes in identifying the maths of permutation and combination.Can anyone please tell me an easy way to identify quickly whether the math is about permutation or combination?
Thank you,
Shafia.

 

[jedishrfu]

Permutations are when the order matters and combnations are when it doesn't.

https://www.mathsisfun.com/combinatorics/combinations-permutations.html