Question

If A={1,2,3,4,5} and B= {4,5,6,7} find A-B and B-A?

Answer 1

A-B={1,2,3}
B-A={6,7}
because A-B contains all the element of set a but not the element of set B
similarly B-A is done in this way

Answer 2

A={1,2,3,4,5} and B= {4,5,6,7}⇒A-B={1,2,3}
⇒B-A={6,7}