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In Exercises, express all probabilities as fractions.Area
Chapter 4, Problem 36BSC(choose chapter or problem)
Problem 36BSC
In Exercises, express all probabilities as fractions.
Area Codes USA Today reporter Paul Wiseman described the old rules for the three-digit telephone area codes by writing about “possible area codes with 1 or 0 in the second digit. (Excluded: codes ending in 00 or 11, for toll-free calls, emergency services, and other special uses.)” Codes beginning with 0 or 1 should also be excluded. How many different area codes were possible under these old rules?
Questions & Answers
QUESTION:
Problem 36BSC
In Exercises, express all probabilities as fractions.
Area Codes USA Today reporter Paul Wiseman described the old rules for the three-digit telephone area codes by writing about “possible area codes with 1 or 0 in the second digit. (Excluded: codes ending in 00 or 11, for toll-free calls, emergency services, and other special uses.)” Codes beginning with 0 or 1 should also be excluded. How many different area codes were possible under these old rules?
ANSWER: