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How many different six-digit numbers can be formed using all of the following digits : 3, 3, 4, 4, 4, 5 ........

How many different six-digit numbers can be formed using all of the following digits : 3, 3, 4, 4, 4, 5 ........ Correct Answer 60

There are 6 digits among them 2 threes and 3 fours in them total numbers = 6!/(2!x3!) = 60

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