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OpenStudy (anonymous):
The password for the school's grading system is a 4-digit code. If adjacent numbers cannot be the same, what is the probability that someone could guess the correct code with just one attempt? A. 1/4,608 B. 1/7,290 C. 1/10,000 D. 1/5,040
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OpenStudy (tamtoan):
what is the probability for the first digit?
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