Practice Average Questions and Answers

• If the average of two numbers is 20 and the square root of their product is 16, then the difference between the numbers is:
• The certain sum amounts to Rs11313.5 in 2(1/2) years at 12% p.a., interest compounded 10 months. The sum (in Rs) is:
• The average salary of A, B and C is Rs. 22000 while average salary of B, C and D is Rs. 25000. If the average salary of D be 2 times of that of A, then the...
• A toy seller has white, pink, and blue balls in the ratio 3:7:11. The number of pink balls is more than the number of white balls by a number which is a mu...
• In a World Cup match, the average runs scored by Virat Kohli in his first 8 matches are 28. What should be his average score in the next two matches for th...
• The average age of a group of 70 students is 14 years. If three students whose ages are 22years, 20years, ________ years is replaced with three new student...
•  A hollow spherical metallic ball has an external diameter 8cm and is 1/2cm thick. The volume of the ball (in cm cube) is.
• The average age of the husband, wife, and their child 3 years ago was 24 years and that of the Wife and the child 4 years ago was 19 years. The present age...
• The average age of 12 boys in the group is 9 years. If 2 more boys join the group, the average is increased by 1 year. What is the average age (in years) o...
• Each side of a rhombus is 20cm long and the length of one of its diagonals is 24cm, then find the area of the rhombus.
• The average salary of 24 employees is recorded as ₹ 16,584. If the salary of an employee with value ₹14,526 was entered Wrongly as ₹ 41,238, then the...
• The ratio of number of girls to number of boys is 3: 2 in a class of 70 students. The average marks scored by the boys in Physics is 72 and the average mar...
• The average of first five multiples of 3 is 
• The average number of books on Biology, Chemistry, and Physics in a book shop is 300. Biology books are 150 more than the average number of Chemistry and P...
• Find the average of all the numbers between 9 and 31, which are divisible by 5?
• Anish and Ajay are business partners. Three years ago, their average age was 18 years. Vikas has recently joined them and now the average age of three part...
• The average salary of 28 employees is recorded as ₹ 16,584. If the salary of an employee with value ₹14,526 was entered Wrongly as ₹ 41,238, then the...
•  In a school with 400 students, the average age of the boys is 16 years and that of the girls is 12 years. If the average age of school is 14 years 9 mont...
• In a Company the average income of all the employees is Rs. 22000 per month. Recently the company announced an increment of Rs. 2000 per month for all the ...
• Four persons ‘A’, ‘B’, ‘C’, and ‘D’ have different amounts with them. ‘D’ has twice the amount than that of ‘A’. The amount ‘B’...
• The average weight of a class of 25 student is 60 KG. If X is student joined the class,  than the average weight of whole class increases by (2X – 7)Kg....
• In a gathering of 30 guests, the average age of each guest in the class is 21 years. Later, 4 more guests join the party, causing the average age of the en...
• The average age of a group of 10 friends is 27 years. If one friend leaves the group, the average becomes 25years. Find the age of the friend who left the ...
• 32 × 15 + 60% of 200 = ? + 120
• [123 ÷ 8 ÷ 9] × 144 = ? + 12 × 5
• The meaning of 12 observations is 15. One more observation is included, and the new mean becomes 17. The 13th observation is.
• The average of five consecutive natural numbers is 14. What will be the average of the seven numbers if the next two natural numbers are also included?
• The present average age of X, Y, and Z is 45 years. 8 years ago, the average age of X and Y was 38 years. What is the present age of Z?
• The average monthly fee of all 45 students in a class is Rs. 9,500. After an increment, the new monthly average fee of each student becomes Rs. (9500 + X)....
• In a group of 50 students, the average monthly tuition is Rs. 7,200. Following a fee adjustment, the new average monthly tuition per student is Rs. (7200 +...
• The average monthly fee for 30 students in a workshop is Rs. 10,000. After an increase, the new monthly average fee for each student is Rs. (10000 + X). If...
• The average salary of a group of 60 employees is Rs. 400. If 6 employees receiving an average salary of Rs. 450 leave the group and 4 new employees receivi...
• Anita bought a refrigerator at a discount of 20% on MRP. She earned one-third the amount of her CP by renting it for 300 days. After that, she resells it a...
• The average age of a group of eight children is 9 years. Two children, whose ages were 7 years more and 5 years more than the average age, left. Two new ch...
• The average age of a group of four children is 11 years. From the group, one child, whose age was 6 years more than the average age, left. Four new childre...
• The average age of a group of nine children is 7 years. From the group, three children, whose ages were 3 years more, 2 years more, and 4 years more than t...
• The average weight of 8 people is 75 kg. When three new people with their weights in the ratio 3:4:5 joined the group, the average weight of all the people...
• The average weight of 6 people is 80 kg. When two new people with their weights in the ratio 2:3 joined the group, the average weight of all the people rem...
• A bag contains 6 red, 10 yellow, and 14 black balls. If 2 balls are picked at random without replacement, find the probability that the first ball is red a...
• Average of four consecutive prime numbers R1, R2, R3, and R4 is (14 + x). If the average of R1 and R2 is (11 + x) and the average of R3 and R4 is (11 + 2x)...