Students of three different classes appeared in common examination. Pass average of 10 students of first class was 70%, …

David obtained 76, 65, 82, 67 and 85 marks (out of 100) in English, mathematics, physics, chemistry and bi…

When the average age of a couple and their son was 42 years, the son married and got a child after one year. When the ch…

The average age of a family with 5 members is 28. If one of the 5 members of age 20 is excluded the average age of the f…

In an examination average marks obtained by the girls of a class is 85 and the average marks obtained by the boys of the…

Five years ago the average age of A, B, C, D was 45 years. By including X the present average of all the five is 49 year…

Distance between two stations A and B is 778km. A train covers the journey from A to B at 84 km per hour and returns bac…

In an examination, a pupil’s average mark was 63 per paper. If he had obtained 20 more marks for his Geography pap…