In what ratio should a 20% methyl alcohol solution be mixed with a 50% methyl alcohol solution so that the resultant solution has 40% methyl alcohol in it?

A 1:2

B 2:1

C 1:3

D 3:1

Solution

Correct Answer: Option A

Let = quantity of 20% solution needed ( in any units ) Let = quantity of 50% solution needed ( in the same units ) = alcohol in 20% solution = alcohol in 50% solution given:

Solution

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