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Mathematics, 10.11.2020 20:40 witerose701
A house alarm code is in the form AABC. Digits A must be 2, 4, or 9. Digit B can be any digit. Digit C cannot be a 0. How many different four-digit alarm codes can be formed for a house alarm?
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A house alarm code is in the form AABC. Digits A must be 2, 4, or 9. Digit B can be any digit. Digit...
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