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Chapter 12: Q9. (page 634)

A bookshelf holds 4 different biographies and 5 different mystery novels. How many ways can one book of each type be selected?

  1. 1
  2. 9
  3. 10
  4. 20

Short Answer

Expert verified

D) There are 20 waysone book of each type can be selected.

Step by step solution

01

Step 1. Given Information.

Given a bookshelf holds 4 different biographies and 5 different mystery novels. One book of each type is to be selected.

02

Step 2. Calculation.

There are 4 ways to select one of the four different biographies.

And, there are 5 ways to select one of the five different mystery novels.

By the Fundamental Counting Principle, there are4脳5=20 ways to choose one book of each type.

03

Step 3. Conclusion.

Hence, by Fundamental Counting Principle, there are 20 ways one book of each type can be selected.

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