Question

A= {all even integers from 2-20 inclusive} B={all odd integers from 1-19} what is the value of a-b?

Answer 1

B is also inclusive

Answer 2

a-b is whatever is in a but not b

Answer 3

How would that work if both sets have different number? A={2,4,6,8,10,12,14,16,18,20} B={1,3,5,7,9,11,13,15,17,19}