A student got 72% in math and 84% in history. To get an overall average of 75%, how much should the student get in the third subject?	Choices
A) 65 %  B) 67 %  C) 69 %  D) 71 %  E) 73 %

Rationale: "72 + 84 + x = 3 * 75 x = 69 the answer is c ."
Answer: C