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JEE MATHEMATICS MCQ: COMBINATIONS

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The number of five digit numbers that contain 7 exactly once is

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Correct option: A

\left( {41} \right)\left( {{9^3}} \right)

Option A (

\left( {41} \right)\left( {{9^3}} \right)

) is correct because it accounts for the placement of the digit 7 in different positions within the five-digit number.

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n