9 total outcomes
You can list out all the outcomes like this: 1a, 2a, 3a, 1b, 2b, 3b, 1c, 2c, 3c
or you can multiply 3 (the number of disks in one bag) by 3( the number of disks in the other bag)
The 2nd method is more efficient, also you can use these methods if you get another similar problem