If 4 Americans, 3 Frenchman, and 3 Englishmen are to be seated in a row, how many seating arrangements are possible when people of the same nationality must sit next to each other?
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People with same nationality will form three different groups so 3! ways
Now , arrangements within the group
Total ways : 3!×3!×3!×4! = 5184
Now , arrangements within the group
Total ways : 3!×3!×3!×4! = 5184
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