1. Find the correct average   10,100,1000,1000

2. cricketer has a mean score of 58 runs in nine innings. Find out how many runs are to be scored by him in the tenth innings to raise the mean score to 61.

3. For a student to clear an examination, he must score 55% marks. If he gets 120 and fails by 78 marks, what is the total marks for the examination?

4. Find the correct average   1,2,3,4,5

5. Find 40% of  100

6. What is the percentage of ratio 5:4?

9. The average of seven numbers is 12. What is the sum of the numbers?

10. Find 100% of   7456

11. What percent of  800 is  600

12. A fruit seller had some apples. He sells 40% apples and still has 420 apples. What is the total number of apples he had originally?

13. Find 40% of  50

14. What percent of  500 is  10

16. Find 5% of   780

17. Find the correct average   2,4,6,8,10

18. The mean weight of a group of seven boys is 56 kg. The individual weights (in kg) of six of them are 52, 57, 55, 60, 59 and 55. Find the weight of the seventh boy

19. If the price of a product is first decreased by 25% and then increased by 20%, then what is the percentage change in the price?

20. What percent of  10 is  1