Question: A 9-digit phone number cannot start with 0 or 1. Assume that there are no restrictions on the remaining 8 numbers. How many telephone

A 9-digit phone number cannot start with 0 or 1. Assume that

A 9-digit phone number cannot start with 0 or 1. Assume that there are no restrictions on the remaining 8 numbers. How many telephone numbers are possible in which all 9 digits are different? The possible number of 9-digit telephone numbers where all the digits are different is

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