Lecture Notes 15

# S c 1200 4200 3600 5400 1200 4200 earn at least 40000

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Unformatted text preview: 0, and 1200 have a college degree and make at least \$40,000, then 4800 – 1200 = 3600 have college degrees but earn less than \$40,000. S C 1200 4200 3600 5400 – 1200 = 4200 earn at least \$40,000 and do not have a college degree. Set Union Consider the following sets: C = {x | x is a college graduate} S = {x | x earns at least \$40,000} Suppose we want to mail a questionnaire to all individuals in a certain city who are college graduates or who earn at least \$40,000, or both. Then the individuals to receive the questionnaire include those who are members of set C or set S. C = {x | x is a college graduate} S = {x | x earns at least \$40,000} The union of sets C and S is the shaded region. C S The union of two sets A and B, written is the set of all elements in A or in B. The key word is “or” which implies one or the other or both. Example 2 Find A B. a. b...
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## This document was uploaded on 03/09/2014 for the course MATH 122 at Western Nevada College.

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