# Math

How many passwords can be made using 2 letters and 4 digits (this time the letters don’t have to come first)

DDDDLL = 6760000 (w repition)
3276000 (w/o repition)

**am i working this correctly**

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asked by Shay
1. Is zero allowed as a digit? Often, that isnot allowed because of confusion with O.

Ok, allowing zero, with repetition.

26*26*10*10*10*10=you are correct.
allowing zero, no repetition
26*25*10*9*8*7 you are correct.

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