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Elementary Statistics: A Step By Step Approach | 9th Edition | ISBN: 9780073534985 | Authors: Allan Bluman
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Software Selection The top-10 selling computer software

Chapter 4, Problem 3RE

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QUESTION:

Problem 3RE

Software Selection The top-10 selling computer software titles last year consisted of 3 for doing taxes, 5 antivirus or security programs, and 2 “others.” Choose on title at random.

a. What is the probability that it is not used for doing taxes?

b. What is the probability that it is used for taxes or is one of the “other” programs? (4–1)

Source: www.infoplease.com

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QUESTION:

Problem 3RE

Software Selection The top-10 selling computer software titles last year consisted of 3 for doing taxes, 5 antivirus or security programs, and 2 “others.” Choose on title at random.

a. What is the probability that it is not used for doing taxes?

b. What is the probability that it is used for taxes or is one of the “other” programs? (4–1)

Source: www.infoplease.com

ANSWER:

Solution:

Step 1 of 3:

The 10-top selling computer software titles consists of 3 for doing taxes, 5 antivirus or security programs, and 2 others.

One title is randomly chosen.

  1. We have to find the probability that it is not used for doing taxes.
  2. We have to find the probability that it is used for taxes or is one of the other programs.

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