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

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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.

[spoiler]OA=D[/spoiler]

Source: GMAT Paper Tests
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