Book edition Middle English Edition

Author(s) Carter

Pages 804 pages

ISBN 9780079039903

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Short Answer

How many area codes were possible before 1995?

The number of possible area codes before 1995 is 160.

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Step by Step Solution

TABLE OF CONTENTS :

TABLE OF CONTENTS

Step 1. Given Information.

Given that before 1995, area codes had the format (XYZ)

where X = 2,3, …, or 9

Y = 0 or 1

Z = 0, 1, 2, …, or 9

It is to be determined how many area codes were possible before 1995.

Step 2. Calculation.

For X there are 8 ways to be selected.

For Y there are 2 ways to be selected.

For Z there are 10 ways to be selected.

By the Fundamental Counting Principle, there are $8 \times 2 \times 10 = 160$ different ways to select the 3-digit area code.

Step 3. Conclusion.

Hence, the number of possible area codes before 1995 is 160.

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Algebra 2

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Short Answer

How many area codes were possible before 1995?

Step by Step Solution

Step 1. Given Information.

Step 2. Calculation.

Step 3. Conclusion.

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Short Answer

How many area codes were possible before 1995?

Step by Step Solution

Step 1. Given Information.

Step 2. Calculation.

Step 3. Conclusion.

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