The average expenditure of Mahesh for the January to June is Rs. 8400 and he spends Rs. 2400 in January and Rs. 3000 in July. The average expenditure for the months of February to July is:

The arithmetic mean of the scores of a group of students in a test was 64. The brightest 15% of them secured a mean score of 90 and the dullest 20% secured a mean score of 28. The mean score of remaining 65% is:

Out of three numbers, the first is twice the second and is half of the third. If the average of the three numbers is 63, then difference of first and third numbers is:

A batsman in his 12th innings makes a score of 79 runs and thereby increase his average score by 1. What is his average after the 12th innings?

Rahul Dravid has a certain average for 13 innings. When he plays the 14th inning he scores 150 runs and his average increases by 3 runs. What is the new average?

The average age of 8 persons in a committee is increased by 2 years when two men whose ages are 35 years and 45 years are replaced by two new men. The average age of the two new men is (in years)

The average marks secured by 55 boys was 67. But it was discovered that an item 85 was misread as 30. What is the correct mean of marks?

The average of 8 numbers is 19. The average of first and sixth numbers is 17 and that of the third, fifth and seventh numbers is \(24\frac{1}{3}\). If the second number is less than the fourth number by 8, and greater than the eighth number by 2, then the sum of fourth number and eighth number is:

There are 500 seats in a classroom placed in a similar row. After the reconstruction of the classroom, the total number of seats became 10% less. The number of rows was reduced by 5 but each row contained 5 seats more than before. How many rows and how many seats in a row were there initially in the classroom?

The average of a certain set of x numbers is y and the average of a certain set of y numbers is x. The average of all the numbers taken together is

The average age of 6 students is 11 years. If two more students of ages 14 and 16 years join. What will their now average age ?

If a hostel’s mess owner expends Rs. 5000 on vegetables, Rs. 3000 on spices and Rs. 6500 on gas services per month for 50 students then what is the monthly average expenditure per student of his hostel’s mess.

The mean temperature from Monday to Wednesday was 40°C and on Tuesday was 36°C. The average of Tuesday to Thursday was 44°C. If the temperature of Thursday was 5/4th that of Monday, the temperature of Thursdays was

The average salary of Sanjay from January to June is Rs. 12000 and from July to September is Rs. 13000 and for last 3 months the average salary is Rs. 1500 more than July to September. Find the average annual salary of Sanjay.

A truck owner buys petrol at Rs. 6.50, Rs. 7 and Rs. 7.50 per litre for three successive years. What approximately will be the average cost per litre of petrol if he spends Rs. 3200 each year?

The average age of a family is 24 years which is consisting 5 members, out of which the youngest being 6 years old. What would be the average age of the family just before his birth?

The average weight of 30 girls is 40kg, another 40 girls is 30kg and another 20 girls is 20kg. Find the average weight of all the girls.

A librarian purchased 50 story books for his library. But he saw that he could get 14 more books by spending Rs. 76 more and the average price per book would be reduced by Rs. 1. The average price (in Rs.)of each book he bought, was:

The average age of a 15-member cricket squad is 19 years, if the coach’s age is included, the average increase to 22 years. What is the coach’s age?

The average revenues of 11 consecutive years of a company is Rs. 77 lakhs. If the average of first 6 years is Rs. 72 lakhs and that of last 6 years is Rs. 84 lakhs, What is the revenue for the sixth year.

The average age of 3 people is 46 years. When another man joins the group, the average reduces to 42 years. Now, another woman with age 4 years more than the new man replaces one of the first three people. The average age of these 4 is then 40 years. What is the age of the replaced person?

A tabulator while calculating the average marks of 100 students of an examination, by mistake enters a student’s marks as 68, instead of 86 and obtained the average as 58; the actual average is

Average marks obtained by 40 students is 56. If the average marks of 8 students who failed in the examination are 10, what are the average marks of students who passed the examination?

In a cricket team of 11 players, one player weighing 42kg is injured and his place is taken by a new player due to which the average weight of team is reduced by 100 grams. Find weight of new player.

The average weight of 48 students of a class is 36 kg. If the weights of teacher and principal is included. The average becomes 36.76 kg. Find the sum of the weights of teacher and principal?