Hello, kurac!

Password must have length between 6 and 8.

Each password contains at least 1 digit [0-9].

Other characters either upper case or lower case.

So we have 62 different possiblities in each position, am i correct? . Yes!

Consider the 6-character passwords.

With no restrictions, there are: . possible passwords.

But the password must contain at least one digit.

We must eliminate the passwords withnodigits (all letters).

. . There are: . passwords which have no digits.

Hence, there are: . six-character passwords

. . which contain at least one digit.

Similarly, there are:

. . seven-character passwords with at least one digit

. . eight-character passwords with at least one digit.