I have the MGMAT number properties book, but still having trouble. Is there some other resource, preferably a free online one, that I can consult?
Many counting questions can be solved by applying the Fundamental Counting Principle (FCP).
We have a free video on the subject: https://www.gmatprepnow.com/module/gmat-counting?id=775
Afterwards, you can tackle these two practice questions:
- https://www.gmatprepnow.com/module/gmat-counting?id=778
- https://www.gmatprepnow.com/module/gmat-counting?id=779
Cheers,
Brent
