#### Answer

$0$ corresponds to the case where no line is in use, and $50$ corresponds to the case where all lines are in use.

#### Work Step by Step

The possible values are all integers from $0$ to $50$

Published by
Wiley

ISBN 10:
1118539710

ISBN 13:
978-1-11853-971-2

The possible values are all integers from $0$ to $50$

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