Option 3 : 1485

SSC MTS Full Mock Test

257616

100 Questions
100 Marks
90 Mins

Cost of 30 chairs = Rs. 1500

∴ Cost of each chair = Rs. (1500/30) = Rs. 50

After 10% increase, cost of each chair = Rs.(50 + 50 × 10/100) = Rs. 55

After 10% decrease, number of chairs = 30 - 30 × 10/100 = 27

∴ Total cost of chairs,

⇒ 27 × 55

⇒ Rs. 1485