A chemist mixed $x$ liters of a 2% saline solution with $y$ liters of…

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(Assume the volumes of the solutions are additive.) [cite: 1325, 1326]

A chemist mixed

x

liters of a 2% saline solution with

y

liters of a 5% saline solution to produce a 3% saline solution. Which equation best represents this situation?

0.02 x + 0.05 y = 3 (x + y)

0.02 x + 0.05 y = 0.03 (x + y)

0.2 x + 0.5 y = 3 (x + y)

0.2 x + 0.5 y = 0.3 (x + y)