In a certain accounting class of 100 students, 70% of the students took the final exam on the assigned day while the rest of the students took the exam on a make-up date. If the students on the assigned day had an average score of 60%, and the students on the make-up date had an average score of 90%, what was the average score for the entire class? Choose the correct choice from the following options.
A) 65%
B) 67%
C) 69%
D) 72%
E) 75%
70% of the class scored 60% and 30% of the class scored 90%.   The difference between 60% and 90% is 30%.   The average will be 60% + 0.3(30%) = 69%.   The answer is 69%.
<result>C</result>
In a certain accounting class of 100 students, 70% of the students took the final exam on the assigned day while the rest of the students took the exam on a make-up date. If the students on the assigned day had an average score of 60%, and the students on the make-up date had an average score of 90%, what was the average score for the entire class?