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anonymous

  • 4 years ago

3. Ethan forgot the four-digit code to the lock on his briefcase. However, he did remember that the first digit is 4 and the last digit is either 9 or 4. The middle digits could be any number from 0 through 9 inclusive. What is the greatest number of four-digit codes Ethan might have to try in order to to open his briefcase? A 162 B 20 C 200 D 22

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  1. anonymous
    • 4 years ago
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    |dw:1327416700467:dw|

  2. anonymous
    • 4 years ago
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    no answer is 1*10*10*2=200

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