Question

A man buys 50 litre of oil at 10 per litre and another 40 litre of oil at 12 per litre and mixes them. He sells the mixture at the rate of 11 per litre. What will be his gain per cent if he is able to sell the whole oil?
(1) 100/98 %
(2) 100 10/49 %
(3) 10 1/49 %
(4) None of these

Answer 1

Hey mate here is ur answer
the answer is option 3 because the total oil he bought is 90 litres and c.p. of 90 litres oil is (50*10)500 + (40*12 ) 480 I.e.980 and the s.p of 90 litres oil is 990 so the gain percent is option 3
I hope it helps