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Suppose a four-digit alarm code is formed by choosing digits from 0 to 9, with repetition allowed. Which of the following expressions would be a

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Suppose a four-digit alarm code is formed by choosing digits from 0 to 9, with repetition allowed. Which of the following expressions would be a correct way to count the number of such codes? Choose the correct answer below. O A. 10 . 10 . 10 . 10 or 10 P4 O B. 10- 10 . 10 . 10 O C. 10.9.8.7 O D. 10 4

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