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20 February, 20:10

Customer account "numbers" for a certain company consist of 2 letters followed by 3 numbers. Step 2 of 2 : How many different account numbers are possible if repetitions of letters and digits are not allowed?

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  1. 20 February, 20:14
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    Step-by-step explanation:

    letters can be chosen in 26*25=650 ways

    digits can be chosen in 10*9*8=720 ways

    total number of ways=650*720=468000 ways.
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