The grade point average of the entire class is 80. If the average of one fourth of the class is 92, what is the average of the rest of the class?  Choose the correct answer:  A) 73  B) 74  C) 75  D) 76  E) 77
Let x be the number of students in the class.   Let P be the average of the rest of the class.   80x = (1/4)92x + (3/4)(P)x   320 = 92 + 3P   3P = 228   P = 76.   The answer is 76.
<result>D</result>
The grade point average of the entire class is 80. If the average of one fourth of the class is 92, what is the average of the rest of the class?