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Avg score: 25% • Most missed: “The ratio of Laxmi’s age to the age of her mother is 3 : 11. The difference of t…”
Average Problems
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1. The average age of students of Mr Gambhir’s class is 15.8 years. The average age of boys in the class is 16.4 years and that of the girls is 15.4 years. The ratio of number of boys to the number of girls in the class is?
2. The captain of a cricket team of 11 members is 26 years old and the wicket keeper is 3 years older. If the ages of these two are excluded, the average age of the remaining players is one year less than the average age of the whole team. Find out the average age of the team.
3. The age of father 10 years ago was thrice the age of his son. Ten years hence, father’s age will be twice that of his son. What is the ratio of their present ages?
4. A student needed to find the arithmetic mean of the numbers 3, 11, 7, 9, 15, 13, 8, 19, 17, 21, 14 and ‘x’. He found the mean to be 12. What is the value of ‘x’?
5. The average age of 12 men is decreased by a year when two of them having ages 28 years and 32 years are replaced by two women of same age. The age of replaced woman is?
6. Father is aged three times more than his son Sunil. After 8 years he would be two and a half times of Sunil’s age. After further eight years, how many times would he be of Sunil’s age?
7. Shamsher is younger than Ranjan by 7 years. If the ratio of their ages is 7 : 9, find the age of Shamsher.
8. Five years ago, the average age of A, B, C and D was 45 years. With E Joining them now, the average of all the five is 49 years. The age of E is?
9. The average age of husband, wife and their child 3 years ago was 27 years and that of wife and the child 5 years ago was 20 years. What is the present age of the husband?
10. The sum of the present ages of Hemant and his son Dhairya is 60 years. Five years ago, Hemant’s age was four times the age of Dhairya. So now the son’s age is years:
11. Sandeep’s age after six years will be three-seventh of his father’s age at that time. Ten years ago the ratio of their ages was 1 : 5. What is Sandeep’s father’s age at present?
12. SUNDER’s age after 15 years will be 5 times his age 5 years back. Find out the present age of SUNDER?
13. Sobha’s father was 38 years of age when she was born while her mother was 36 years old when her brother four years younger to her was born. What is the difference between the ages of her parents?
14. The ratio of the age of a man and his wife is 4 : 3. At the time of marriage the ratio was 5 : 3 and After 4 years this ratio will become 9 : 7. How many years ago were they married?
15. A grocer has a sale of Rs. 6435, Rs. 6927, Rs. 6855, Rs. 7230 and Rs. 6562 for 5 consecutive months. How much sale must he have in the sixth month so that he gets an average sale of Rs. 6500?
16. The average age of Girls in a class is 16 years and that of the Boys is 15 years. There are 3 trans genders in the class with average age of 14 years. What is the average age for the whole class?
17. A is as much younger than B as he is older than C.If the sum of the ages of B and C is 50 years, what is the difference between the ages of A and B?
18. Ten years ago, P was half of Q’s age. If the ratio of their present ages is 3 : 4, what will be the total of their present ages?
19. In an examination, a student’s average marks were 63. If he had obtained 20 more marks for his Geometry and 2 more marks for his Hindi, his average would have been 65. How many subjects did he appear in the examination?
20. The ratio of Laxmi’s age to the age of her mother is 3 : 11. The difference of their ages is 24 years. The ratio of their ages after 3 years will be?
21. The average of five numbers is 27. If one particular number “x” is excluded, the average becomes 25. What is the excluded number “x”?
22. If six years are subtracted from the present age of Ajay and the remainder is divided by 18, then the present age of Rahul is obtained. If Rahul is 2 years younger to Denis whose age is 5 years, then what is Ajay’s present age?
23. A library has an average of 510 visitors on Sundays and 240 on other days. What is the nearest average number of visitors per day in a month of 30 days beginning with a Sunday?
24. The average weight of 16 boys in a class is 50.25 kg and that of the remaining 8 boys is 45.15 kg. Find the average weights of all the boys in the class.
25. The ages of Soumaya and Krishan are in the proportion of 3 : 5. After 9 years, the proportion of their ages will be 3 : 4. Then the current age of Krishan is:

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