SOLUTION: A department store wants to send codes for $15 off a $75 purchase to the subscribers of its e-mail list. The coupon code will have three letters, followed by one digit, followed by
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Question 1144411: A department store wants to send codes for $15 off a $75 purchase to the subscribers of its e-mail list. The coupon code will have three letters, followed by one digit, followed by one letter. The letters P, Q, and R will not be used. So, there are 23 letters and 10 digits that will be used. Assume that the letters can be repeated. How many such coupon codes can be generated? Answer by ikleyn(52810) (Show Source):
