The table above gives the number of calories and grams of protein per kilogram of foods \(S\) and \(T.\) If a total of

[VJesus12]

Food -- Number of Calories per Kilogram -- Number of Grams of Protein per Kilogram
\(S ------ 2.000 -------------- 150\)
\(T ------ 1,500 -------------- 90\)

The table above gives the number of calories and grams of protein per kilogram of foods \(S\) and \(T.\) If a total of \(7\) kilograms of \(S\) and \(T\) are combined to make a certain food mixture, how many kilograms of food \(S\) are in the mixture?

(1) The mixture has a total of \(12,000\) calories.
(2) The mixture has a total of \(810\) grams of protein.

Answer: D

Source: GMAT Paper Tests