Question: An alarm system requires a 7-digit code using the digits 0 through 9. Each digit may only be used once in the code. How many

An alarm system requires a 7-digit code using the digits 0 through 9. Each digit may only be used once in the code. How many different codes are possible? Question 9Select one: a. 120 b. 181,440 c. 604,800 d. 5040

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