Teacher took exam for English, average for the entire class was 80 marks. If we say that 10% of the students scored 95 marks and 20% scored 90 marks then calcualte average marks of the remaining students of the class. Pick: A) 60 B) 70 C) 65 D) 75 E) 80
Lets assume that total number of students in class is 100 and required average be x.   Then from the given statement we can calculate :   (10 * 95) + (20 * 90) + (70 * x) = (100 * 80)   70x = 8000 - (950 + 1800)= 
<gadget id="calculator">8000 - (950 + 1800)</gadget>
<output>5_250</output>
5250 ANSWER : 75   x= 75.
<result>D</result>
Teacher took exam for English, average for the entire class was 80 marks. If we say that 10% of the students scored 95 marks and 20% scored 90 marks then calcualte average marks of the remaining students of the class.