AIR MATH

Math Question

A four-digit passcode is created out of the digits from 1 through 9. If the numbers can repeat, what is the probability that the passcode is \( 1234 ? \) Select one: \( \frac{1}{9^{4}} \) \( \frac{1}{9} \) \( \frac{1}{9} \cdot \frac{1}{8} \cdot \frac{1}{7} \cdot \frac{1}{6} \) \( \frac{1}{9^{2}} \)

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