Seven people are sitting in a theater watching a show. The row they are
in contains seven seats. After intermission, they return to the same row
but choose seats randomly. What is the probability that neither of the
people sitting in the two aisle seats was previously sitting in an aisle seat?
(a) 3/7
(b) 10/21
(c) 11/21
(d) 4/7
(e) 13/21
in contains seven seats. After intermission, they return to the same row
but choose seats randomly. What is the probability that neither of the
people sitting in the two aisle seats was previously sitting in an aisle seat?
(a) 3/7
(b) 10/21
(c) 11/21
(d) 4/7
(e) 13/21
