Some fruits are bought at 20 for Rs.160 and an equal

Solution

Let total fruit brought be LCM of 20 and 15 = 60 So, let 60 fruits are bought at 20 for Rs. 160, then cost of 60 fruits = 160/20 × 60 = Rs. 480 ⇒ 60 fruits are also brought at 15 for Rs. 140, then cost of 60 fruits = 140/15 × 60 = Rs. 560 ⇒ Total cost of 120 fruits = Rs. 480 + Rs. 560 = Rs. 1040 SP of 12 fruits = Rs. 144 ⇒ SP of 1 fruit = Rs. 12 ⇒ SP of 120 fruits = Rs. 12 × 120 = Rs. 1440 Profit = SP - CP = Rs.1440 - Rs. 1040 = Rs. 400 Profit percent = 400/1040 × 100 = 38.46%