These are the ways:
1 and 3, 1 and 4, 1 and 5, 1 and 6, .... 1 and 10, 2 and 4, 2 and 5, 2 and 6, 2 and 7, .... 2 and 10, 3 and 5, 3 and 6, 3 and 7, 3 and 8, ... 3 and 10, 4 and 6, 4 and 7, 4 and 8, 4 and 9, 4 and 10, 5 and 6, 5 and 7, 5 and 8, 5 and 9, 5 and 10, 6 and 8, 6 and 9, 6 and 10, 7 and 9, 7 and 10, 8 and 10.
SO there are 7, 6, 5, 4, 3, 2, 1. There are 28 ways.
