Practice: Averages
Untimed practice · 25 questions in this set
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Question 1 of 25
Medium
Averages
The average age of 40 students in a class is 16 years. The average age of 10 of them is 15 years. What is the average age of the remaining 30 students?
Question 2 of 25
Medium
Averages
The average salary of 5 workers in a factory is Rs. 24,000. If the salary of the manager is included, the average salary becomes Rs. 26,000. What is the salary of the manager?
Question 3 of 25
Medium
Averages
The average of the first 15 natural numbers is:
Question 4 of 25
Medium
Averages
A batsman has a certain average for 10 innings. In the 11th inning, he scores 132 runs, thereby increasing his average by 5 runs. What is his average after the 11th inning?
Question 5 of 25
Medium
Averages
The average of 8 numbers is 20. If each number is increased by 2, what will be the new average?
Question 6 of 25
Medium
Averages
Mean of 5 numbers is 27. If one number is excluded, mean = 25. Excluded?
Question 7 of 25
Medium
Averages
The average of five numbers is 54. The average of the first three numbers is 52, and the average of the last three numbers is 56. What is the third number?
Question 8 of 25
Medium
Averages
The average of the first 20 natural numbers is:
Question 9 of 25
Medium
Averages
The average age of a group of 10 people is 40 years. If a new person joins the group, the average age becomes 42 years. What is the age of the new person?
Question 10 of 25
Medium
Averages
The average score of three students in a test is 76. If the first student scored 78 and the second scored 82, what did the third student score?
Question 11 of 25
Medium
Averages
The average height of 30 students in a class is 150 cm. If the heights of the teacher and a new student are included, the average height increases by 1 cm. If the teacher's height is 180 cm, what is the height of the new student?
Question 12 of 25
Medium
Averages
The average salary of 5 employees in a company is Rs. 30,000. If a new employee is hired at a salary of Rs. 45,000, what will be the new average salary?
Question 13 of 25
Medium
Averages
Average of 7, 12, 15, 20, 26?
Question 14 of 25
Medium
Averages
In a class of 40, the average mark is 65. If 5 students are removed and average becomes 70, sum of removed marks?
Question 15 of 25
Medium
Averages
The average weight of a group of 15 people increases by 2 kg when a new person weighing 70 kg joins the group. What was the average weight of the original group?
Question 16 of 25
Medium
Averages
The average of 6 numbers is 12. If one number is removed, the average of the remaining numbers is 11. What is the number that was removed?
Question 17 of 25
Medium
Averages
The average score of a batsman in 10 innings is 50. How many runs must he score in the next inning to increase his average to 55?
Question 18 of 25
Medium
Averages
The average of four consecutive even numbers is 27. What is the largest of these numbers?
Question 19 of 25
Medium
Averages
The average of 4 numbers is 20. If one number is removed, the average becomes 15. What is the number removed?
Question 20 of 25
Medium
Averages
Average age of 30 students is 14. With teacher, average becomes 15. Teacher's age?
Question 21 of 25
Medium
Averages
A student scored an average of 60 marks in four subjects. If the total marks obtained in three subjects are 200, what is the mark obtained in the fourth subject?
Question 22 of 25
Medium
Averages
The average age of a group of 5 friends is 25 years. If one more friend joins the group, the average age becomes 24 years. What is the age of the new friend?
Question 23 of 25
Medium
Averages
In a class of 50 students, the average score in a math test is 75. If the scores of 5 students who scored an average of 60 are removed, what is the new average score of the remaining students?
Question 24 of 25
Medium
Averages
The average mark obtained by 20 students is 45. If the marks of two students were wrongly entered as 35 and 50 instead of 40 and 55, find the correct average.
Question 25 of 25
Medium
Averages