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Answer:
The difference of set Y from set X can be denoted as X – Y. It is a set
whose elements can be found in X but not in Y.
Let us consider the previous example. Analene and Jessica were asked
to list their top 3 hobbies. Analene likes dancing, singing, and reading, while
Jessica likes watching, singing, and reading.
Let X = {dancing, singing, reading}
Y = {watching, singing, reading}
Find: a. X – Y b. Y – X