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A chemist has one solution which is 50% ...

A chemist has one solution which is 50% acid and another solution which is 25% acid. How much each should be mixed to make 10 litres of a 40% acid solution ? (Use Cramer’s rule to solve the problem).

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The correct Answer is:
50% acid is 6 litres, 25% acid is 4 litres
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