Combinatorics BOB

Alrighty! I'm back! So... Combinatorics... I thought this unit was the most interesting. Mr. K. really did blow my mind when he talked about 'PhI' (Φ). I was so amazed and everything!. The thing that confused me the most was finding all the different card combinations. I have to think for such a long time to figure out what numbers to use. Another that I'm still confused about is the distinguishable and non-distinguishable things. I sometimes get confused with which one's which. The rest of the things... I think I'm okay with. Happy studying!