calculates

College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter9: Counting And Probability
Section9.1: Counting
Problem 92E: DISCUSS: Complementary Combinations Without performing any calculations, explain in words Why the...
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There are 15 containers, each of which is filled with 3 tennis balls.

  • Bob calculates the total number of tennis balls by counting by 3’s fifteen times. In other words, Bob counts 3, 6, 9, 12, . . . 42, 45.
  • Michael calculates the total number of tennis balls by adding 15 + 15 + 15 = 45.
  1. Are both methods correct?
  2. Are the methods related?

Is there a relevant property of arithmetic? Explain your answers to these questions.

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