#### Answer

$M\cdot N$

#### Work Step by Step

If you can choose one item from a group of $M$ items and a second item from a
group of $N$ items, then the total number of two-item choices is $M\cdot N$.

Published by
Pearson

ISBN 10:
0321867327

ISBN 13:
978-0-32186-732-2

$M\cdot N$

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