RRB Assistant Loco Pilot and Technician Model Paper 9 with solutions

(d) Let the marked price be ₹ x.
∴ In case I, SP = ₹ $\frac{75\mathit{x}}{100}$
Single discount equivalent to successive discounts of 15% and 10%.
= $\left(15+10-\frac{15\times 10}{100}\right)$ % = 23.5 %
∴ S.P. in this case = ₹ $\frac{76.5\mathit{x}}{100}$
∴ $\frac{76.5\mathit{x}}{100}$ - $\frac{75\mathit{x}}{100}$ = ₹ 72
⇒ $\frac{1.5\mathit{x}}{100}$ = 72
∴ x = $\frac{72\times 1000}{1.5}$ = ₹ 4800