Each character in a password is either a digit [0-9] or lowercase letter [a-z]. How many valid passwords are there with the give
n restriction(s)? Length is 13. No character repeats.
1 answer:
Answer:
2310789600
Step-by-step explanation:
10 digits + 26 letters = 36
₃₆C₁₃ = 2310789600
Hope this helps, although i am not 100 percent sure its right.
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