Question

Solution A contains 10% acid and solution B contains 30% acid. In what ratio should solution A be mixed with Solution B to obtain a mixture with 25% acid?

A 1 : 2 Correct Answer Incorrect Answer
B 3 : 1 Correct Answer Incorrect Answer
C 1 : 3 Correct Answer Incorrect Answer
D 2 : 1 Correct Answer Incorrect Answer

Solution

In solution 1 acid percent=10 In solution 2 acid percent=30   In the resulting mixture acid percent=25% By applying the principle of allegations we have =(30-25)/(25-10) =5/15 =1:3

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