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The average of $4,6,8$ is increased by 4 . What is the new average?

The average of 12 numbers is 35 . If one number is excluded, the average becomes 33. Find the excluded number.

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 age of 48 students of a class is 22 years. If the age of the teacher is also included, the average age of the whole group becomes 23 years. The age (in years) of the teacher is:

The average age of 30 students in a group is 18 years. When the teacher's age is included, the average age of the group increases by 1 year. What is the teacher's age (in years)?

The average age of 40 students of a class is 12 years. If the age of the teacher is also included, the average age of the whole group becomes 13 years. The age (in years) of the teacher is:

The average age of 35 students in a group is 15 years. When the teacher's age is included, the average age of the group increases by 1.25 years. What is the teacher's age (in years)?

The average age of 57 students of a class is 13 years. If the age of the teacher is also included, the average age of the whole group becomes 14 years. The age (in years) of the teacher is:

There are 38 members in group $A$, 31 members in group B and 52 members in group C . All the members of these groups went to a restaurant. The average amount spent on each member of group A, B and C is ₹375, ₹309 and ₹298, respectively. The total average amount (in ₹) spent per member is:

There are 44 members in group $A$, 26 members in group B and 45 members in group C . All the members of these groups went to a restaurant. The average amount spent on each member of group A, B and C is ₹403, ₹383 and ₹228, respectively. The total average amount (in ₹) spent per member is:

If the average marks of three sections of Class X, having 35, 40, and 25 students, respectively, are 90,88 , and 80 , then the average marks of all the students of Class X, is:

If the average marks of three sections of Class IX, having 30, 45 and 50 students, respectively, is 80,75 and 90 , then the average marks of all the students of Class IX, is:

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?