To take a test, a
group of 10 students are to be seated in two rows; the front and
the back row,
where each row has
5 seats. Find the number of possible distinct seating arrangements
if
(i) there is no
restriction, [1]
(ii) 2 particular
students are not to be seated next to each other on the same row,
[3]
(iii) 2 particular
students are absent on that day and no student seated in the front
row is taller
than any student
seated in the back row. (You may assume that no 2 students have
the
exact same
height.)
hi i need help with part iii. Thanks in advance