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? 

Find the average of all prime numbers between 30 and 50.

The average of three consecutive odd numbers is 12 more than one third of the first of these numbers. What is the last of the three numbers?

What is the average of the following numbers?
38, 92, 45, 25, 60

Directions: Given table shows the data of population in 5 different parks. Study the data carefully and answer the questions.

If 30 females from each park are above 80 years age then find the average of no. of females who are below or equal to the age of 80 years from all the parks.