Abstract
These days schoolchildren are taught about sets. A second grader* was asked to name “the set of girls in his class.” This can be done by a complete list such as:
“Nancy, Florence, Sally, Judy, Ann, Barbara, ... ”
A problem arises when there are duplicates. To distinguish between two Barbaras one must indicate their family names or call them B1 and B2. The same member cannot be counted twice in a set.
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© 2003 Springer Science+Business Media New York
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Chung, K.L., AitSahlia, F. (2003). Set. In: Elementary Probability Theory. Undergraduate Texts in Mathematics. Springer, New York, NY. https://doi.org/10.1007/978-0-387-21548-8_1
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DOI: https://doi.org/10.1007/978-0-387-21548-8_1
Publisher Name: Springer, New York, NY
Print ISBN: 978-1-4419-3062-0
Online ISBN: 978-0-387-21548-8
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