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29 January, 09:01

A home alarm system randomly assigns a six-character code for each customer. The code will not repeat a character. The characters are 1, 2, 3, 4, 5, M, T, G, Y, or R. What is the total number of codes that can be randomly assigned?

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  1. 29 January, 12:12
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    Since order is important.

    There are 10 characters, the total number of combinations is:

    10!/4!=151200

    Or if you prefer:

    10*9*8*7*6*5=151200
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