The average age of 15 students of a class is 15 years. Out of these, the average age of 5 students is 14 years and that of the other 9 students is 16 years. The age of the 15th student is____________?

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In a hostel there were 100 students. To accommodate 20 more students the average is decreased by rupees 5. But total expenditure increased by Rs.400. Find the total expenditure of the hostel now?

A. Rs.5000 B. Rs.4600 C. Rs.5400 D. Rs.2300...

The average marks of a class of 30 students is 40 and that of another class of 50 students is 60. Find the average marks of all the students?

A. 50 B. 47.5 C. 59 D. 52.5...

The average runs scored by a batsman in 20 matches is 40. In the next 10 matches the batsman scored an average of 13 runs. Find his average in all the 30 matches?

A. 31 B. 29 C. 28 D. 30...

The average of 35 students in a class is 16 years. The average age of 21 students is 14. What is the average age of remaining 14 students?

A. 15 years B. 17 years C. 18 years D. 19 years...

The average of five numbers is 27. If one number is excluded, the average becomes 25. The excluded number is__________?

A. 25 B. 27 C. 30 D. 35...