Question 162823
You have five items (in this case days) from which you need to choose three without repetition. This is a combination problem.

The formula for this is 5C3 or "five choose three" and the formula is:
5! / (5-3)!3! which is (5x4x3x2x1) divided by (2x1)(3x2x1)

This gives you an answer of 10.

Good luck