Statistics

A web-site asks users to create a 5-symbol PIN code where first and second symbols are any letters from the English alphabet and next 3 symbols are any digits. How many different PIN codes can be created?

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  1. 26*26*10^3 = ?

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    posted by PsyDAG
  2. There are 26 letters in the alphabet and 10 digits that you can use (0,1,2,3,4,5,6,7,8,9)

    As a result, we can find the number of combinations by doing the following:
    26 x 26 x 10 x 10 x 10
    since the first two symbols are alphabets and the last three are digits. After doing the math you get
    26 x 26 x 10 x 10 x 10 = 676000 => You can make a total of 676,000 PIN codes

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    posted by Helper

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