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JEE MATHEMATICS MCQ: PERMUTATIONS

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How many numbers consisting of 5 digits can be formed in which the digits 3, 4 and 7 are used only once and the digit 5 is used twice?

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Correct option: B

60

Option B (60) is correct because the number of such numbers is calculated by arranging the 5 digits, considering the repetition of the digit 5.

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