A shopkeeper mixed low-quality vegetable oil costing Rs. 40 per litre with sunflower refined oil costing Rs. 80 per litre in the ratio of 2… — Answer & Discussion

A shopkeeper mixed low-quality vegetable oil costing Rs. 40 per litre with sunflower refined oil costing Rs. 80 per litre in the ratio of 2 ∶ 3 respectively. If he sold the mixture at Rs. 100 per litre, find his profit percentage.

A42.75%
B47.5%
C51.5%
D56.25%

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Discussion 1

CCommunity28 Apr 2019

Let the total quantity of the mixture be 10 ltr.

10 litres of mixture contains,

⇒ (2/5) × 10 = 4 litres of low quality vegetable oil

⇒ (3/5) × 10 = 6 litres of sunflower refined oil

The cost price of 10 litres mixture = 4 × 40 + 6 × 80 = 160 + 480 = Rs. 640

The cost price of 1 litre mixture = 640/10 = Rs. 64

Profit earned = 100 – 64 = Rs. 36

∴ Profit percentage = (36/64) × 100 = 56.25%