dewanjones31 dewanjones31

27-05-2017
Mathematics

contestada

frank is choosing a 2 letter password from the letters A B C D and E. the password cannot have the same letter repeated in it. how many such passwords are possible

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cdemoss cdemoss

27-05-2017

you can have ten choices

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ejules12 ejules12

27-05-2017

20 possible combinations

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