In how many ways can 8 Indians, 4 Americans and 4 Englishmen be seated in a…
20182018
In how many ways can 8 Indians, 4 Americans and 4 Englishmen be seated in a row such that all persons of the same nationality sit together?
Answer: A. 3!⋅4!⋅8!⋅4! — Treat each nationality as one block → 3 blocks
- A.
3!⋅4!⋅8!⋅4!
- B.
3!⋅8!
- C.
4!⋅4!
- D.
8!⋅4!⋅4!
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Correct answer: A
Treat each nationality as one block → 3 blocks
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