February 23, 2017

Homework Help: Pre-Cal

Posted by Sebastian on Monday, March 26, 2012 at 3:28pm.

A telephone dial has holes numbered from 0 to 9 inclusive, and eight of these holes are also lettered. How many different telephone numbers are possible with this dial, if each "number" consists of two letters followed by five numbers, where the first number is not zero?

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