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Mathematics, 25.10.2019 05:43 cdizzlesmith2511

Aseven digit telephone number is of the form abc-defg. in one particular state, the digit 'a' can be any digit except 0 and 1. the digits b and c can be any digit for 2-9. the digits d, e,f, and g can be any digit 0-9 except they can't all be the same. how many seven digit phone numbers are possible with these restrictions?

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Aseven digit telephone number is of the form abc-defg. in one particular state, the digit 'a' can be...
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