Over the weekend, your family is going on vacation.
Your mom is letting you bring 5 DVDs for the long road trip.
How many ways can you choose the five DVDs if you have 12 DVDs in all? (order does not matter)
SOLUTION:
This is a good example of Combination problem:
12 C 5 = 12 ! / ( 5 ! 7 ! ) = 792.
