Solve Combination Problem: Choose 4 Shoes from 5 Pairs

[ron_jay]

Homework Statement

A closet has 5 pairs of shoes. The number of ways in which 4
shoes can be chosen from it so that there will be no complete pair are?

Homework Equations

Permutation and Combination formulae

The Attempt at a Solution

I tried but couldn't figure it out anyway.

 

[quantumdude]

It would be a lot easier for us to tell you what you did wrong, if you showed us what you did.

 

[unplebeian]

Since you don't want to have a pair you are only left with 5 shoes to pick from. Now choose 4 from that.