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A petrol pump owner mixed leaded and unl...

A petrol pump owner mixed leaded and unleaded petrol in such a way that the mixture contains `10%` unleaded petrol. What quantity of leaded petrol should be added to 1 litre mixtures, so that the percentage of unleaded petrol becomes `5%` ?

A

1000 ml

B

900 ml

C

1900 ml

D

1800 ml

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The correct Answer is:
A
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