Habits of Average Vs Topper Students

Average marks of 15 students ofclassfirst is 160. Avearge marks of 10 students ofclass second is 120. Average marks of 15 students of class third is 180. What will be the average marks of students of all the classes together?

The average height of 22 students of a class is 140 cm and the average height of 28 students of another class is 152 cm. What is the average height of students of both the classes?

Toppers Talk

Toppers Talk

The average age of students is A and the average age of teachers is B. The number of the students is 45 times of the number of teachers. What is average age of students and teachers together?

The average marks of 120 students are 35 . If the average of passed students was 39 and failed students was 15 , then find the number of students who have passed .

The average marks obtained by 100 candidates in an examinatiion are 45. If the average marks of the passed students are 50 while the average marks of the failed students is 40. Then find the number of students who passes the examination.

In context of the habit of absenteeism of student :