Originally Posted by

**armitage75** Hi guys,

Lets say I have two sets:

$\displaystyle A = \{ \emptyset, 1, 2 \}$ (where 0 represents the empty set, I don't know how to include the appropriate symbol)

$\displaystyle B = \{ 1, 4 \}$

I am asked for the set difference: A - B.

I understand what is asked, I must list which elements are elements of A but not elements of B.

What is throwing me a bit is the fact that they listed the empty set as an explicit member of A.

Would the correct answer be:

A - B = { 0, 2 }.