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Chapter 13: Q. 14. (page 868)

Choosing seats If 4people enter a bus having9vacant seats, in how many ways can they be seated?

Short Answer

Expert verified

The answer is15,120.

Step by step solution

01

Step 1. Given information.

Number of people are 4and number of seats are 9.

02

Step 2. Calculation.

P9,4=9!4!=9脳8脳7脳6脳5脳4!4!=9脳8脳7脳6脳5=15,120

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