In the afternoon, a student read 100 pages at the rate of 60 pages per hour. In the evening, when she was tired, she read 100 more pages at the rate of 40 pages per hour. What was her average rate of reading the pages per hour? 

Sunil has 40 coins of 10 paise and 25 paise each. If he has Rs 7.75, then how many 10 paise coins are there?

Subjects, there were 9 boys and some girls. In a test, the mean score obtained by the boys was 13 while that obtained by the girls was 15. If the overall average was 14.28, what was the total number of students in the class? 

Average of 11 number is 30. If the average of first 10 numbers is 22, then find the 11th number?

a, b, c, d, e, f, g are consecutive even numbers. j, k, l, m, n are consecutive odd numbers. The average of all the numbers is: 

Find the average of the following sets of numbers.

693, 456, 876, 532, 934, 691, 596, 398, 682

A cricketer had a certain average of runs for his 64 innings. In his 65th innings, he is bowled out for no score on his part. This brings down his average by 2 runs. His new average of runs is: