Question

Make up a problem different from any found in the text that requires a permutation to solve. Give it to a friend to solve and critique.

Short answer

Question given : Find the number of words, with or without meaning, that can be formed with the letters of the word ‘CHAIR’.

Friend's solution : $120$ways

Friend's critique : Solved by using permutation because order matters

Step-by-step solution

. Given Information

We are asked to provide a permutation our friend and let him/her solve it and give critique

. Permutation question provided to friend

The question provided is as follows :

Find the number of words, with or without meaning, that can be formed with the letters of the word ‘CHAIR’.

. Friend's solution and critique

Solved by using permutation because order matter :

$5!=5\times 4\times 3\times 2\times 1$

$=120$ways