In what ratio should 20% ethanol solution be mixed with 40% - Exam Yatra

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SSC CGL Tier-2 9-March-2018 Maths-shift-1
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In what ratio should 20% ethanol solution be mixed with 40% ethanol solution to obtain a 28% ethanol solution?

[SSC CGL Tier-2 9-March-2018 Maths-shift-1]

A 2 : 3

B 8 : 5

C 3 : 2

D 5 : 8

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