Set operations: Let us denote by P the set of all people, by S the set of people

Question

Set operations:

Let us denote by P the set of all people, by S the set of people who are single, by C the set of people who have children, by W the set of women and by M the set of men. For each question below, write down an expression that represents the set being described. Write exactly one expression for each question.

(a) Women who are either married with children, or single and do not have children.

(b) All possible married heterosexual couples, i.e., all possible pairings of married

men and married women.

(c) The number of all possible married heterosexual couples.

Explanation / Answer

a)

W with C or C'

b)

P -----> [ M or W] <----> [ M U W ]

c)

P ----->> M + W or W + C or M + C

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