A standard provincial landline telephone number in Cavite contains area code of 3 digits and telephone number of 6 digits. a. How many possible telephone numbers with area code are there in which no digit is repeated? b. What is the probability that the generated numbers are all 8s or all 9s?

A standard provincial landline telephone number in Cavite contains area code of 3 digits and telephone number of 6 digits. a. How many possible telephone numbers with area code are there in which no digit is repeated? b. What is the probability that the generated numbers are all 8s or all 9s?

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Question

A standard provincial landline telephone number in Cavite contains area code of 3 digits and telephone number of 6 digits.
a. How many possible telephone numbers with area code are there in which no digit is repeated?
b. What is the probability that the generated numbers are all 8s or all 9s?

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