Question

In how many ways can 6 students be seated in a row of 6 seats if 2 of the students insists o sitting beside each other?

Answer 1

treat the 2 as one item, so you are arranging 5
which is 5!
but the two students could be interchanged, so

number of ways to seat the students
= 2(5!) = ...

Answer 2

240

Answer 3

50

Answer 4

65