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Question

How many different 9 digit numbers can be made with 3 fours, 4 twos and 2 threes?

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Solution

According to the question,

Total given numbers = 9 (Three - four, four - twos and 2 - three)

No of ways = 9!(3!4!2!) ( Denominator is for repetation of numbers )

=(987654!)(64!2)
=(9475)

=1260



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