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OpenStudy (anonymous):
At ReallyUnsecurePassword.com, they demand that users have a password of length 4 that uses exactly 2 different digits. How many different passwords can there be
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OpenStudy (kropot72):
xyxy xyyx yxyx yxxy
OpenStudy (anonymous):
what is this kropot72 it should be between 0 and 999
OpenStudy (kropot72):
@sagarrobo Are you saying that the answer should be between 0 and 999? If x and y represent the two different digits, then there are 4 possible passwords.
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