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Mathematics, 07.10.2020 22:01 lberries08
A seven digit telephone number is of the form ABC-DEFG. In one particular state, the digit ‘A' is restricted to any number between 1 and 9. The digits B and C are restricted to any number between 2 and 9. The digits D, E,F, and G have no restriction. How many seven digit phone numbers are possible with these restrictions?
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A seven digit telephone number is of the form ABC-DEFG. In one particular state, the digit ‘A' is re...
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