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Maths Puzzle
Numerical Ability
How many liters of a blue dye that costs $1.80 per liter must be mixed with 20 L of Anil, which costs $2.60 per liter, to make a mixture that costs $2.12 per liter?
A. 30 L
B. 25 L
C. 20 L
D. 15 L
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