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JEE Main 2019 Mathematics question

MathematicsPermutations and CombinationsJEE Main 2019

All possible numbers are formed using the digits 1, 1, 2, 2, 2, 2, 3, 4, 4 taken all at a time. The number of such numbers in which the odd digits occupy even places is:

Answer: (A)

Solution

Odd digits 1, 1, 3 in 3 of the 4 even places: Missing superscript or subscript argument{}^4C_3\dfrac{3!}{2!}$

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Question ID VK-009282