A tank contains 30 litres of diesel, 6 litres are drawn out and filled by kerosene. This process is repeated three times. What will be the proportion of diesel to kerosene in the resulting mixture ?

Correct answer marked below

64/61

Correct

20/25

64/125

1/2

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What this question tests

Your ability to reason about weighted averages and the composition of mixtures.

Averaging the percentages of two solutions without weighting by their volumes.