How many different seven-digit telephone numbers can be formed if the first digit cannot be zero?
How many different seven-digit telephone numbers can be formed if the first digit cannot be zero?
Chapter9: Sequences, Probability And Counting Theory
Section: Chapter Questions
Problem 33RE: How many ways are there to construct a 4-digit code if numbers can be repeated?
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How many different seven-digit telephone numbers can be formed if the first digit cannot be zero?
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