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30 July, 07:28

Carl is choosing a four-character password for his

cell phone. The password can contain letters

and digits only, and can't include repeating

characters. How many passwords are possible?

+3
Answers (1)
  1. 30 July, 08:36
    0
    100

    Step-by-step explanation:

    10 didgits only do 1 once, so you can do it 10 times and 10 x 10 is 100
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