How many phone numbers (7 digits) have no numbers larger than a 6 if the first digit of a phone number can be neither a 0 nor a 1? How many such phone numbers do have a number larger than a 6?
How many phone numbers (7 digits) have no numbers larger than a 6 if the first digit of a phone number can be neither a 0 nor a 1? How many such phone numbers do have a number larger than a 6?
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.7: Combinations
Problem 33E
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How many phone numbers (7 digits) have no numbers larger than a 6 if the first digit of a phone number can be neither a 0 nor a 1? How many such phone numbers do have a number larger than a 6?
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