Two sets A and B are, such that n(A∪B)=21, n(A) = 10, n(B)=15, find n(A∩B) and n(A-B).

Two sets A and B are, such that n( $A \cup B$ )=21, n(A) = 10, n(B)=15, find n( $A \cap B$ ) and n(A-B).

Match the items on the right to the items on the left.

step 1

step 2

step 3