Average- Mean, Median & Mode (Chapter-1): 110 Important MCQs for Indian Competitive Exam Prep

The average of 12 numbers is 15 and the average of the first two is 14. What is the average of the rest?

A sequence consists of 7 terms arranged in descending order. The mean value of the sequence is 70. If 30 is added to each term, and then each term is divided by 2 to get the new mean as ‘K'. Find the difference between K and the original mean.

In a class, there are 40 boys and their average age is 16 years. One boy, aged 17 years, leaving the class and another joining, the average age becomes 15.875 years The age of the new boy is

The test scores of a class are 70, 75, 80, 85, 90. If each score is multiplied by 2, what is the new median and mean of the scores?

The ages of a group of students are 20, 22, 25, 23, 26. If the average age of the group is 25, what could be added to the group to keep the average the same?

A car travels to a place 150 km away at an average speed of A-50 km/hr and returns at B-30 km/hr. His average speed for the whole journey in km/hr is

The following data represents the ages of a group of people: 18, 21, 24, 27, 30. What is the median age if each age is decreased by 5?

A teacher has two classes of students. In the first class, the average score on a test is 85, and there are 30 students. In the second class, the average score on the same test is 92, and there are 25 students. What is the overall average score for both classes combined?

A car owner buys petrol at Rs.7.50, Rs. 8 and Rs. 8.50 per litre for three successive years. What approximately is the average cost per litre of petrol if he spends Rs. 4000 each year?

A library has an average of 510 visitors on Sundays and 240 on other days. The average number of visitors per day in a month of 30 days beginning with a Sunday is:

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. The present age of the husband is:

What is the relation between mean, median, and mode?

If the average of 5 positive integers is 40 and the difference between the largest and the smallest of these 5 numbers is 10, what is the maximum value possible for the largest of these 5 integers?

The average of odd numbers up to 100 is

The following data represents the ages of a group of people: 20, 22, 25, 27, 30. What is the mean age if each age is increased by 5?

The scores of a math test in a class are 90, 85, 75, 80, 95. If each score is decreased by 5, what happens to the mode of the new scores?

If the average of 6 consecutive even number is 25, the difference between the largest and the smallest number is

The heights (in inches) of a group of students are 58, 60, 62, 64, 66. If each height is doubled, how does it affect the median and mean of the new heights?

In a class of 5 students, average weight of the 4 lightest students is 40 kgs, Average weight of the 4 heaviest students is 45 kgs. What is the difference between the maximum and minimum possible average weight overall?

In the first 10 overs of a cricket game, the run rate was only 3.2. What should be the rate in the remaining 40 overs to each the target of 282 runs?

The test scores of a class are as follows: 85, 92, 78, 90, 88, 75, 82, 95, 70, 98. What is the range of the data?

In a dataset of exam scores, the 25th percentile is calculated to be 72. What does this mean?

The test scores of a class are as follows: 70, 80, 85, 90, 95. What is the mean score if each score is squared before calculating the mean?

The average of a non-zero number and its square is 5 times the number. The number is

The sum of three consecutive even numbers is 28 more than the average of these three number. Then the smallest of these number is

A student has gotten the following grades on his tests: 87, 95, 76, and 88. He wants an 85 or better overall. What is the minimum grade he must get on the last test in order to achieve that average?

The average of 5 consecutive integers starting with 'm' is n. What is the average of 6 consecutive integers starting with (m + 2)?

The test scores of a class are as follows: 70, 80, 85, 90, 95. If the highest score is removed, what happens to the median and mean of the remaining scores?

The following data represents the test scores of a class: 85, 92, 78, 90, 88, 75, 82, 95, 70, 98. If the highest and lowest scores are removed, what happens to the median and mean of the remaining scores?

The scores of a group of students in a chemistry test are as follows: 55, 62, 68, 72, 78, 85, 91, 96, 98, 100. What is the third decile score in this data set?