If equal amounts of X and Y are combined (150 grams of each), the percentage of protein in the resulting mixture would be (10+15)/2 = 12.5%, resulting in .125*300 = 37.5 grams of protein. Since the mixture contains just a bit more protein (38 grams), it must include a bit more than 150 grams of Y, which contains a higher percentage of protein, and a bit less than 150 grams of X, which contains a lower percentage of protein.GHong14 wrote:How to solve?
The correct answer is B.
Alternatively, we could plug in the answer choices for the amount of X contained in the mixture:
Answer choice B: 140 grams X, 160 grams Y
.1*140 = 14
.15*160 = 24
14+24 = 38. Success!
