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OpenStudy (anonymous):
Lila forgot the security code for her apartment building. The code is two different digits followed by a capital letter. How many different possible codes are there?
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OpenStudy (anonymous):
10 * 10 * 26 =2600 do you see why?
OpenStudy (anonymous):
wait no sorry. 10 * 9 * 26 = 2340. because the two numbers are different
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