JEE Advanced 2007 Mathematics question
One Indian and four American men and their wives are to be seated randomly around a circular table. Then the conditional probability that the Indian man is seated adjacent to his wife given that each American man is seated adjacent to his wife is
Answer: (C)
Solution
Given event: each of the 4 American couples sits together. Treat each American couple as one unit (2 internal arrangements each); with the Indian man and his wife separately there are 6 units around the table: $(6
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