The final exam of a particular class makes up 40% of the final grade, and Moe is failing the class with an average (arithmetic mean) of 45% just before taking the final exam. What grade does Moe need on his final exam in order to receive the passing grade average of 60% for the class?  Choose the correct option
A) 75%
B) 82.5%
C) 85%
D) 90%
E) 92.5%
Lets Assume that total marks are 100.   Final exam weightage : 40   Rest of the exams : 60   Percentage scored by Moe out of 60 = 45%   Hence, Total marks obtained out of 60 = 45% of 60 = 27   Marks required in the final exam to get 60% in end = 60(marks) - 27 = 33 marks   i.e. 33 marks required out of 40 = 82.5 marks required out of 100 in final exam   ANS: 82.5 % (82.5%)
<result>B</result>
The final exam of a particular class makes up 40% of the final grade, and Moe is failing the class with an average (arithmetic mean) of 45% just before taking the final exam. What grade does Moe need on his final exam in order to receive the passing grade average of 60% for the class?