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  4. Two families with three members each and one family with four members are to be seated in a row. In how many ways can they be seated so that the same family members are not separated?

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Q. Two families with three members each and one family with four members are to be seated in a row. In how many ways can they be seated so that the same family members are not separated?

JEE MainJEE Main 2020Permutations and Combinations

Solution:

Correct answer is (b) $(3 !)^{3} \cdot(4 !)$

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