math

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How many different license plates could be made if they have one or two letters followed by 1,2,or 3 digits? Reptetitions are allowed.

I figured that 26 would be for 1 letter and 52 for 2 letters
so (26+52) but not sure how to figure the numbers part.

  • math -

    26*10+26*10^2+26*10^3+
    26^2*10+26^2*100 + 26^2*1000

    check that.

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