Question 1196350
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From the context, repeating is allowed.


Then there are 3 possibilities for the very first position and (26+10) = 36 possibilities 

for each and every of five (5) remaining positions,  INDEPENDENTLY.


According to the Fundamental Counting Principle, it means that  {{{3*36^5}}} = 181398528  different passwords are possible.    <U>ANSWER</U>
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Solved.