Permutation — Precalculus, what it means and where it is taught
An arrangement where order matters. P(n,r) = n!(n-r)!.
Taught in Precalculus.
Where it is taught
Practise this idea
2 questions in the course bank use Permutation, in Counting, Permutations & the Binomial Theorem.
Problem 1
A committee of 3 is chosen from 8 people. Which applies?
- A combination
- A permutation
- Neither
- Both give the same
Worked answer
A combination
No, so order does not matter
Problem 2
Gold, silver and bronze are awarded to 3 of 8 runners. Which applies?
- A permutation
- A combination
- Neither
- Both give the same
Worked answer
A permutation
Yes, so order matters