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Average of 30 results is 25 . Later, it was found one score 55 was misread as 25. What is the correct average?

The average of the squares of the first 8 natural numbers is B. If each number is doubled first, and then squared, what is the new average?

In a class of 50 students, the marks of 49 students are given, and their average marks are 75 . The teacher then added the marks of the 50th student, and the new average became 65 . What were the marks of the 50th student?

The average marks of 20 students in a class is 48.Later, 5 new students join the class, each scoring 60 marks.After this, the teacher finds that one of the original students' marks was wrongly entered as 28 instead of 68 . Find the final average marks of the class.

There are 4 numbers M1, M2, M3 and M4. Average of M1, M2 and M3 is 40. Average of M2, M3 and M4 is 34. Value of M1 is 36. What is the value of M4?

In a school library, there are three sections: Science, Mathematics, and Literature. The average number of books in the Science and Mathematics sections is 1,320. The average number of books in the Mathematics and Literature sections is 1,480.If the total number of books in all three sections is 4,050, find the number of books in the Mathematics section.

The average ages of three groups of artisans are 18, 30, and 22. If the ratio of the number of artisans in the three groups is 3 : 2 : 5, what is the overall average age?

A cricketer's average in 9 innings is 55. If his highest score is excluded, the average drops to 50. What is his highest score?

Three classes have average ages 16, 18 and 21 respectively. The number of students in the three classes is in the ratio 3 : 4 : 5. What is the overall average age of all the students together?

The overall average salary for all employees in an office is ₹32,000. Officers earn an average salary of ₹56,000, while non-officers make an average of ₹20,000. If there are 17 officers, determine the number of non-officers.

The average age of 21 students is 17 years. A teacher joins the group, and the average becomes 20 years. What is the teacher's age?

A train covered a certain distance in 3 parts with average speeds of 12 km/h, 15 km/h and 30 km/h. What is the average speed over the entire journey, assuming equal distances?

The average marks of 40 students in a class is 72. If the marks of one student were wrongly entered as 92 instead of 72, what is the CORRECT average?

The average of 6 different numbers is 120. If the smallest number is 18, what is the average of the remaining five numbers?

The average of 40 numbers was calculated as 28. Later it was found that two numbers were wrongly taken as 23 and 17 instead of 13 and 7. What is the correct average ?

The average of 20 numbers is 55 . If each number is decreased by 8, what will be the new average?

The average salary of employees in a company is ₹30,000. If a new employee with a salary of ₹60,000 joins, the average increases by ₹300. Find the number of employees originally in the company.

The average of 11 numbers is 50. The difference of the largest and smallest number is 60 . If the largest number is removed, the average of the remaining 10 numbers is reduced by 4 . Find the smallest number?