The price of petrol is Rs. 84 per litre and price of kerosene is Rs. 39 per litre. If the profit after selling the mixture at Rs.90 per litre is 20%. What should be the ratio of petrol and kerosene in the mixture.

1
4 : 1
2
1 : 1
3
1 : 2
4
1 : 3

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