Chapter 6.3, Problem 46E

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7th Edition

Stefan Waner + 1 other

ISBN: 9781337280426

Textbook Problem

**Telephone Numbers** In the past, a local telephone number in the United States consisted of a sequence of two letters followed by five digits. Three letters were associated with each number from 2 to 9 (just as in the standard telephone layout shown in the figure) so that each telephone number corresponded to a sequence of seven digits. How many different sequences of seven digits were possible?

To determine

**To calculate:** The number of different sequences of 7 digits where telephone numbers consist of sequences of 2 letters followed by 5 digits and 3 letters are associated with each number from 2 to 9 and each telephone number correspond to a sequence of 7 digits.

Explanation

**Given Information:**

The telephone numbers consist of sequences of 2 letters followed by 5 digits and 3 letters are associated with each number from 2 to 9 and each telephone number correspond to a sequence of 7 digits and the provided figure is

.

**Formula used:**

The Decision Algorithm is to make a set of decisions to determine the number of possible outcomes.

The Addition Principle is, if there is a choice among *r* disjoint alternatives and alternative *r* has

The Multiplication Principle, if there is a sequence of choice with *r* disjoint steps and step *r* has

**Calculation:**

Consider the telephone numbers consist of sequences of 2 letters followed by 5 digits and 3 letters are associated with each number from 2 to 9 and each telephone number correspond to a sequence of 7 digits and the figure

Use the Decision Algorithm to make a set of decisions to determine the number of possible outcomes

Sect-6.1 P-1ESect-6.1 P-2ESect-6.1 P-3ESect-6.1 P-4ESect-6.1 P-5ESect-6.1 P-6ESect-6.1 P-7ESect-6.1 P-8ESect-6.1 P-9ESect-6.1 P-10E

Sect-6.1 P-11ESect-6.1 P-12ESect-6.1 P-13ESect-6.1 P-14ESect-6.1 P-15ESect-6.1 P-16ESect-6.1 P-17ESect-6.1 P-18ESect-6.1 P-19ESect-6.1 P-20ESect-6.1 P-21ESect-6.1 P-22ESect-6.1 P-23ESect-6.1 P-24ESect-6.1 P-25ESect-6.1 P-26ESect-6.1 P-27ESect-6.1 P-28ESect-6.1 P-29ESect-6.1 P-30ESect-6.1 P-31ESect-6.1 P-32ESect-6.1 P-33ESect-6.1 P-34ESect-6.1 P-35ESect-6.1 P-36ESect-6.1 P-37ESect-6.1 P-38ESect-6.1 P-39ESect-6.1 P-40ESect-6.1 P-41ESect-6.1 P-42ESect-6.1 P-43ESect-6.1 P-44ESect-6.1 P-45ESect-6.1 P-46ESect-6.1 P-47ESect-6.1 P-48ESect-6.1 P-49ESect-6.1 P-50ESect-6.1 P-51ESect-6.1 P-52ESect-6.1 P-53ESect-6.1 P-54ESect-6.1 P-55ESect-6.1 P-56ESect-6.1 P-57ESect-6.1 P-58ESect-6.1 P-59ESect-6.1 P-60ESect-6.1 P-61ESect-6.1 P-62ESect-6.1 P-63ESect-6.1 P-64ESect-6.1 P-65ESect-6.1 P-66ESect-6.1 P-67ESect-6.1 P-68ESect-6.1 P-71ESect-6.1 P-72ESect-6.1 P-73ESect-6.1 P-74ESect-6.1 P-75ESect-6.1 P-76ESect-6.1 P-77ESect-6.1 P-78ESect-6.1 P-79ESect-6.1 P-80ESect-6.1 P-81ESect-6.1 P-82ESect-6.1 P-83ESect-6.1 P-84ESect-6.2 P-1ESect-6.2 P-2ESect-6.2 P-3ESect-6.2 P-4ESect-6.2 P-5ESect-6.2 P-6ESect-6.2 P-7ESect-6.2 P-8ESect-6.2 P-9ESect-6.2 P-10ESect-6.2 P-11ESect-6.2 P-12ESect-6.2 P-13ESect-6.2 P-14ESect-6.2 P-15ESect-6.2 P-16ESect-6.2 P-17ESect-6.2 P-18ESect-6.2 P-19ESect-6.2 P-20ESect-6.2 P-21ESect-6.2 P-22ESect-6.2 P-23ESect-6.2 P-24ESect-6.2 P-25ESect-6.2 P-26ESect-6.2 P-27ESect-6.2 P-28ESect-6.2 P-29ESect-6.2 P-30ESect-6.2 P-31ESect-6.2 P-32ESect-6.2 P-33ESect-6.2 P-34ESect-6.2 P-35ESect-6.2 P-36ESect-6.2 P-37ESect-6.2 P-38ESect-6.2 P-39ESect-6.2 P-40ESect-6.2 P-41ESect-6.2 P-42ESect-6.2 P-43ESect-6.2 P-44ESect-6.2 P-45ESect-6.2 P-46ESect-6.2 P-47ESect-6.2 P-48ESect-6.2 P-49ESect-6.2 P-50ESect-6.2 P-51ESect-6.2 P-52ESect-6.2 P-53ESect-6.2 P-54ESect-6.2 P-55ESect-6.2 P-56ESect-6.2 P-57ESect-6.2 P-58ESect-6.2 P-59ESect-6.2 P-60ESect-6.2 P-61ESect-6.2 P-62ESect-6.2 P-63ESect-6.2 P-64ESect-6.2 P-65ESect-6.2 P-66ESect-6.2 P-67ESect-6.2 P-68ESect-6.2 P-69ESect-6.2 P-70ESect-6.2 P-71ESect-6.2 P-72ESect-6.3 P-1ESect-6.3 P-2ESect-6.3 P-3ESect-6.3 P-4ESect-6.3 P-5ESect-6.3 P-6ESect-6.3 P-7ESect-6.3 P-8ESect-6.3 P-9ESect-6.3 P-10ESect-6.3 P-11ESect-6.3 P-12ESect-6.3 P-13ESect-6.3 P-14ESect-6.3 P-15ESect-6.3 P-16ESect-6.3 P-17ESect-6.3 P-18ESect-6.3 P-19ESect-6.3 P-20ESect-6.3 P-21ESect-6.3 P-22ESect-6.3 P-23ESect-6.3 P-24ESect-6.3 P-25ESect-6.3 P-26ESect-6.3 P-27ESect-6.3 P-28ESect-6.3 P-29ESect-6.3 P-30ESect-6.3 P-31ESect-6.3 P-32ESect-6.3 P-33ESect-6.3 P-34ESect-6.3 P-35ESect-6.3 P-36ESect-6.3 P-37ESect-6.3 P-38ESect-6.3 P-39ESect-6.3 P-40ESect-6.3 P-41ESect-6.3 P-42ESect-6.3 P-43ESect-6.3 P-44ESect-6.3 P-45ESect-6.3 P-46ESect-6.3 P-47ESect-6.3 P-48ESect-6.3 P-49ESect-6.3 P-50ESect-6.3 P-51ESect-6.3 P-52ESect-6.3 P-53ESect-6.3 P-54ESect-6.3 P-55ESect-6.3 P-56ESect-6.3 P-57ESect-6.3 P-58ESect-6.3 P-59ESect-6.3 P-60ESect-6.3 P-61ESect-6.3 P-62ESect-6.3 P-63ESect-6.3 P-64ESect-6.3 P-65ESect-6.3 P-66ESect-6.3 P-67ESect-6.3 P-68ESect-6.3 P-69ESect-6.3 P-70ESect-6.3 P-71ESect-6.3 P-72ESect-6.4 P-1ESect-6.4 P-2ESect-6.4 P-3ESect-6.4 P-4ESect-6.4 P-5ESect-6.4 P-6ESect-6.4 P-7ESect-6.4 P-8ESect-6.4 P-9ESect-6.4 P-10ESect-6.4 P-11ESect-6.4 P-12ESect-6.4 P-13ESect-6.4 P-14ESect-6.4 P-15ESect-6.4 P-16ESect-6.4 P-17ESect-6.4 P-18ESect-6.4 P-19ESect-6.4 P-20ESect-6.4 P-21ESect-6.4 P-22ESect-6.4 P-23ESect-6.4 P-24ESect-6.4 P-25ESect-6.4 P-26ESect-6.4 P-27ESect-6.4 P-28ESect-6.4 P-29ESect-6.4 P-30ESect-6.4 P-31ESect-6.4 P-32ESect-6.4 P-33ESect-6.4 P-34ESect-6.4 P-35ESect-6.4 P-36ESect-6.4 P-37ESect-6.4 P-38ESect-6.4 P-39ESect-6.4 P-40ESect-6.4 P-41ESect-6.4 P-42ESect-6.4 P-43ESect-6.4 P-44ESect-6.4 P-45ESect-6.4 P-46ESect-6.4 P-47ESect-6.4 P-48ESect-6.4 P-49ESect-6.4 P-50ESect-6.4 P-51ESect-6.4 P-52ESect-6.4 P-53ESect-6.4 P-54ESect-6.4 P-55ESect-6.4 P-56ESect-6.4 P-57ESect-6.4 P-58ESect-6.4 P-59ESect-6.4 P-60ESect-6.4 P-61ESect-6.4 P-62ESect-6.4 P-63ESect-6.4 P-64ESect-6.4 P-65ESect-6.4 P-66ESect-6.4 P-67ESect-6.4 P-68ESect-6.4 P-69ESect-6.4 P-70ESect-6.4 P-71ESect-6.4 P-72ESect-6.4 P-73ESect-6.4 P-74ESect-6.4 P-75ESect-6.4 P-76ESect-6.4 P-77ESect-6.4 P-78ESect-6.4 P-79ESect-6.4 P-80ESect-6.4 P-81ESect-6.4 P-82ESect-6.4 P-83ESect-6.4 P-84ESect-6.4 P-85ESect-6.4 P-86ESect-6.4 P-87ESect-6.4 P-88ESect-6.4 P-89ESect-6.4 P-90ECh-6 P-1RECh-6 P-2RECh-6 P-3RECh-6 P-4RECh-6 P-5RECh-6 P-6RECh-6 P-7RECh-6 P-8RECh-6 P-9RECh-6 P-10RECh-6 P-11RECh-6 P-12RECh-6 P-13RECh-6 P-14RECh-6 P-15RECh-6 P-16RECh-6 P-17RECh-6 P-18RECh-6 P-19RECh-6 P-20RECh-6 P-21RECh-6 P-22RECh-6 P-23RECh-6 P-24RECh-6 P-25RECh-6 P-26RECh-6 P-27RECh-6 P-28RECh-6 P-29RECh-6 P-30RECh-6 P-31RECh-6 P-32RECh-6 P-33RECh-6 P-34RECh-6 P-35RECh-6 P-36RECh-6 P-37RECh-6 P-38RECh-6 P-39RECh-6 P-40RECh-6 P-41RECh-6 P-42RECh-6 P-43RE

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