Average

The average of five numbers is 20. If one number is removed, the average of the remaining numbers becomes 18. What is the number that was removed?

A class of 30 students has an average score of 75. If a new student joins the class and the average score becomes 76, what is the score of the new student?

In a race, the average speed of a car is 60 km/h for the first half and 90 km/h for the second half. If the total distance is 120 km, what is the average speed for the entire race?

The average of three numbers is 40. If one of the numbers is increased by 20, what will be the new average?

The average age of a group of 10 people is 30 years. If 5 people leave the group and their average age is 32 years, what is the average age of the remaining people?

A teacher gives a test to her students, and the average score is 75. If the top score of 100 is removed from the average calculation, how does this affect the average if the total number of students is 20?

If the average of two numbers is x and the average of three numbers is y, what is the average of all five numbers?

A student scored 80, 90, and 70 in three subjects. If he scores 100 in the fourth subject, what will be his average?

The average of four numbers is 50. If the first number is increased by 10, what is the new average?

A bag contains 3 red balls, 5 blue balls, and 2 green balls. What is the average number of balls of each color?