02)• 20 students and the dean came to the cinema and want to sit in the same row, in which there are 21 seats. The dean must sit on the edge of the row, and Alice, Bob and Carol must NOT be put together. In how many ways can they sit down?
02)• 20 students and the dean came to the cinema and want to sit in the same row, in which there are 21 seats. The dean must sit on the edge of the row, and Alice, Bob and Carol must NOT be put together. In how many ways can they sit down?
Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter2: Systems Of Linear Equations
Section2.4: Applications
Problem 33EQ
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