16 litres of kerosene is mixed with 5 litres of petrol. The price of kerosene is Rs. 12 per litre and the price of petrol is Rs. 33 per litre. The average price of the mixture per litre is:

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Solution

The correct option is B 17
___
Now divide the difference of 12 and 33 in the ratio of 5 : 16 (not in the ratio of 16 : 5)
Here, the difference of 33 and 12 = 21
Again on dividing 21 in the ratio of 5 : 16, we get the first part = 5 and second part = 16
So, the average price = 12+5= 17
Or = 33-16 = 17.

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