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14 November, 09:06

An identity thief watches someone enter a four-digit PIN and manages to see that the first digit is 3. They also know that the second digit is either 4 or 7. If the thief tries guessing the PIN, how many possibilities would there be?

A. 100 B. 162 C. 180 D. 200

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Answers (1)
  1. 14 November, 09:39
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    The answer should be B
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