Answer
10 customers
Work Step by Step
10 customers because it is in the middle of 8 and 12. Customers that spent less than $20 is halfway through 8 and 12. So, 10 customers spent less than 20 dollars.
Algebra 1: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281140
ISBN 13:
978-0-13328-114-9
Chapter 12 - Data Analysis and Probability - 12-2 Matrix Multiplication - Practice and Problem-Solving Exercises - Page 736: 29
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