Question

Let A = {15, 25, 35, 45, 55, 65} and B = {25, 45, 65}. What is A _ B? can someone please help me

Answer 1

I took the test and the answer is {25, 45, 65}

Explanation:

Option b is right. The other guy who said {15, 35, 55} is wrong

Answer 2

The operation indicated, A - B, is a subtraction of sets.

The subtraction of set B from set A means that you have to remove the elements of B that are on A; i.e. A - B = {15, 35, 55}

25, 45 and 65 (which are in the set B) were removed from the set A to form the set A - B