If 15% of a class averages 100% on a test, 50% of the class averages 78% on the test, and the remainder of the class averages 63% on the test, what is the overall class average? (Round final answer to the nearest percent).  Choose the correct answer
A) 76%  B) 77%  C) 78%  D) 79%  E) 80%
This question is a Weighted Average question with a series of dependent variables.   The remaining portion of the class represents 100% - 15% - 50% = 35% of the class   Converting the portions of the class population to decimal weights, we find:   Class 76%verage  100  - 15  - 50= 
<gadget id="calculator"> 100  - 15  - 50</gadget>
<output>35</output>
35% of the class   Converting the portions of the class population to decimal weights, we find:   Class 76%verage= 0.15x100 + 0.50x78 + 0.35x63 = 76.05   The class average (rounded) is 76%   Final 76%nswer   76%) 76%
<result>A</result>
If 15% of a class averages 100% on a test, 50% of the class averages 78% on the test, and the remainder of the class averages 63% on the test, what is the overall class average? (Round final answer to the nearest percent).