Question

10 students are to be seated in rows such that each row should have equal number of students. In how many ways can this arrangement be done?

• A. 3
• B. 4
• C. 1
• D. 2

Answer 1

The correct option is B 4

• 1st way is to keep 10 students in one row, i.e. 1 x 10
• 2nd way is to keep 2 students each in 5 rows, i.e. 5 x 2
• 3rd way is to keep 5 students each in 2 row, i.e. 2 x 5
• 4th way is to keep 1 student each in 10 rows, i.e. 10 x 1
• So, there are 4 ways of seating.