Chapter9: Sequences, Probability And Counting Theory
Section9.5: Counting Principles
Problem 36SE: The number of 5-element subsets from a set containing n elements is equal to the number of 6-element...
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1. If a set S has 5 elements then 2^s has 32 elements.
2.If Z={-3-2-1.0} and Y has k elements then Z × Y has 4k elements
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