A rabbit on a controlled diet is fed daily \(300\) grams of a mixture of two foods, food \(X\) and food \(Y.\)

[Vincen]

A rabbit on a controlled diet is fed daily \(300\) grams of a mixture of two foods, food \(X\) and food \(Y.\) Food \(X\) contains \(10\%\) protein and food \(Y\) contains \(15\%\) protein. If the rabbit's diet provides exactly \(38\) grams of protein daily, how many grams of food \(X\) are in the mixture.

A. 100
B. 140
C. 150
D. 160
E. 200

Answer: B

Source: Official Guide