Free Practice Questions for Average in Maths

Practice questions here, for every subject and every exam. Unlimited questions for unlimited attempts, given with answers and explanations.


Question 61:

Three years ago, the average age of A, B and C was 29 years. If the average age of B and C, 5 years ago, was 23 years, then what is the present age (in years) of A?

Question 62:

Three numbers are in the ratio $2: 3: 4$. The sum of their squares is 2349 . Find the average of these three numbers.

Question 63:

The average of eight consecutive numbers is $10.5$. The largest number is:

Question 64:

The average age of 125 students in a group is $16.2$ years. $40 \%$ of the students are boys and the rest are girls. The average age of the boys is $20 \%$ more than the average age of the girls. What is the average age (in years) of the boys?

Question 65:

The mean of the marks of three students in an examination of total 45 marks is 38 . Two fresh students appeared in the examination. What is the lowest score that can be obtained by the freshman who has scored less marks than the second freshman so that the total average of the marks of five students becomes 40 ?

Question 66:

The average score of 84 students (boys and girls) in a test is 95 . The ratio of the number of boys to that of girls is $10: 11$. The average score of the boys is $20 \%$ less than that of the girls. What is the average score of the boys in the test?

Question 67:

The average weight of some students in a class was $69.5 \mathrm{~kg}$. When 10 students of average weight $68 \mathrm{~kg}$ joined the class, and 6 students of average weight $60 \mathrm{~kg}$ left the class, it was noted that the average weight of the new group of students increased by $2 \mathrm{~kg}$. How many students are there in the class now?

Question 68:

If the average of the 3 -digit numbers $335,2x5, x35,63x$ and $406$ is $411$ , then what will be the average of $x-1, x-3, x+3$ and $x+5$ ?

Question 69:

The average of seven consecutive odd numbers is 27. If the last number is removed from the list, then the average of the remaining numbers is:

Question 70:

When four numbers are arranged in ascending order, their order is $w, x, y$ and $z$. The average of the smallest three digits is $25.5$ while the average of the largest three digits is $29.5$. Find the range of the figures.

Question 71:

The total average of four numbers $a, b, c$ and $d$ is 26. If the average of $\mathrm{a}$ and $\mathrm{b}$ is $19.5$ then the average of $\mathrm{c}$ and $\mathrm{d}$ will be:

Question 72:

Samrat has an average of 51 after 11 completed innings. How much does he need to score before getting out in his next innings to raise his average by another two runs?

Question 73:

A group of five students took an examination. Another student later joined the group after taking the exam. By cursing his marks, the average score of the group increased by 2 points. This student has scored more than the average marks without including him.

Question 74:

The average age of 15 students of a class is 15 years. Out of these, the average age of 5 students is 14 years and the average age of other 9 students is 16 years. The age of the 15th student is -

Question 75:

The average of marks obtained by Raghuveer in 12 tests is 25 . Rumela has an average of 23 points so far, but has appeared in only 8 Tests. What is the average that Rumela has to earn in the remaining 4 Tests to be equal to Raghuveer's average?

Question 76:

The average of three numbers is $16.5$. The average of the first two numbers is $15.5$ while the average of the last two numbers is $18.5$. all three numbers.

Question 77:

The average of 18,27 and 3rd number is 30 . What is the third number?

Question 78:

There are 20 girls in a school. If one of the girls whose age is 18 years is transferred by another girl, then the average age of the girls decreases by 2 months. What will be the age of the newly joined girl?

Question 79:

When four numbers are arranged in ascending order, their order is $w, x, y$ and $z$. The average of the smallest three digits is $25.5$ while the average of the largest three digits is 29.5. Find the range of the data.

Question 80:

The average weight of 25 articles is $50 \mathrm{~kg}$. If the weight of another article $X$ is included in this, the average weight increases to $500 \mathrm{~g}$. What is the weight of article X?