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QUESTION 2 A passcode consists of four numbers. part a. If each may be 0, 1, 2, 3, 4, 5, 6, 7, 8, or 9,

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QUESTION 2 A passcode consists of four numbers. part a. If each may be 0, 1, 2, 3, 4, 5, 6, 7, 8, or 9, how many possible passcodes are there? part b. A restriction is placed that passcodes cannot consist of the same digit repeated four times in a row. With this restriction, how many possible passcodes are there

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