In what ratio must a mixture of 20% alcohol be mixed with another mixture of 50% alcohol so that the resultant mixture contains 40% alcohol?


A) 3:5

B) 2:6

C) 1:2

D) 3:7

Correct Answer:
C) 1:2

Description for Correct answer:
Using the alligation rule we get,

Thus. 20% alcohol has to be mixed with 50% alcohol in the ratio 1 : 2.

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