a) Define | S |, the cardinality of the set S.________________b) Give a formula for |A ? B|, where A and B are sets.

Solution: Step-1: 1. In this problem we need to define |S| , the cardinality of the set S . Definition: The cardinality of a set is a measure of the “number of elements of the set” . The set A = {a , b , c} contains 3 elements . So , A has a cardinality of 3 . The cardinality of a set A is denoted by |A| .This is...