You are to arrange 36 identical chairs in rows such that there is same number of chairs in each row. Each row must contain at least 4 chairs and there must be at least 3 rows. How many different arrangements are possible?

A 4
B 2
C 6
D 5

Correct Answer: 4

4 chairs in 9 rows = 36 chairs 6 chairs in 6 rows = 36 chairs 9 chairs in 4 rows = 36 chairs 12 chairs in 3 rows = 36 chairs - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - So, total ways = 4
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