Solution: At the first glance it seems that the answer is cannot be determined but let’s investigate further. Let the price of the shirt be 12X, where every month he earns ${\frac{1}{12}}^{th}$  of the shirt price plus his wages.He earns $\frac{200}{12}$ every month as salary .. So in 9 months he should've earned 150 cash. But he only got 120 hence Rs.30 went to his shirt deduction.Therefore 3X= 30 $\&$ 12X= 120. Option (c).