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OpenStudy (anonymous):
A code consists of 3 letters and 3 digits. Any of the letters can be repeated. How many different codes are there and is this a permutation or a combination?
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OpenStudy (amistre64):
26*26*26 * 10*9*8
OpenStudy (amistre64):
cant recall if its P or C tho
OpenStudy (amistre64):
Combo cares about order right?
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