Concept explainers
Listing Phone Numbers Raj keeps the phone numbers for his seven closest friends (three men and four women) in his digital phone memory. (Refer to Example 8.) How many ways can he list them for the following conditions?
(a) men are listed before women
(b) men are all listed together
(c) no two men are listed next to each other?
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Mathematical Ideas with Integrated Review and Worksheets plus NEW MyLab Math with Pearson eText -- Access Card Package (Integrated Review Courses in MyLab Math and MyLab Statistics)
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