A student got 74% in math and 81% in history. To get an overall average of 75%, how much should the student get in the third subject?  Select the correct option
A) 66 %
B) 67 %
C) 68 %
D) 69 %
E) 70 %

Rationale: "74 + 81 + x = 3 * 75 x = 70 the answer is e ."
Answer: E