JEE Advance - Mathematics (2007 - No. 10)
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
$${1 \over 2}$$
$${1 \over 3}$$
$${2 \over 5}$$
$${1 \over 5}$$