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How many 9 digit number can be formed using the digits 1, 1, 2, 2, 2, 2, 3, 4, 4 such that odd numbers occurs at even places.

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in Mathematics by (70.2k points)

How many 9 digit number can be formed using the digits 1, 1, 2, 2, 2, 2, 3, 4, 4 such that odd numbers occurs at even places.

(1) 160

(2) 175

(3) 180

(4) 220

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1 Answer

+1 vote
by (69.8k points)

The correct option is (3) 180.

Explanation:

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