Problema Solution
Ashley has 4 CDs that she is going to give away. She lets her best friend choose 3 of the 4 CDs. How many different groups of 3 CDs are possible?
Answer provided by our tutors
Since the order of the CD's is not important, here we are dealing with combinations.
The number of 2-combinations from a given set of 4 elements:
C(4, 3)
Using the formula fo calculating calculations:
We have:
C(4, 3) = 4!/(4 - 3)!3!
C(4, 3) = 4
There are 4 different groups of 3 CDs possible.