Average problems questions and answer
The average of 5 numbers is 20. If one number is excluded, the average becomes 18. What is the excluded number?
A) 16
B) 18
C) 20
D) 22
Answer: D) 22
The average weight of 8 friends is 70 kilograms. If a new friend with a weight of 80 kilograms joins the group, what is the new average weight?
A) 70 kilograms
B) 75 kilograms
C) 77.5 kilograms
D) 80 kilograms
Answer: C) 77.5 kilograms
The average height of a class is 160 centimeters . If the average height of boys is 165 centimeters and that of girls is 155 centimeters, what is the ratio of the number of boys to girls?
A) 1 :1
B) 2:1
C) 3:1
D) 4:1
Answer: B) 2:1
The average of three numbers is 15. If two numbers are 10 and 20 , what is the third number ?
A) 5
B) 15
C) 25
D) 30
Answer: A) 5
The average score of a student in 4 exams is 80. If the scores in the first three exams are 85, 90 and 75 what is the score in the fourth exam ?
A) 70
B) 75
C) 80
D) 85
Answer: D) 85
The average age of a family of four members is 30 years . If the average age of the parents is 35 years, what is the average age of the two children ?
A) 25 years
B) 30 years
C) 35 years
D) 40 years
Answer: A) 25 years
The average of six numbers is 12. If one number is excluded, the average becomes 10. What is the excluded number?
A) 8
B) 10
C) 12
D) 14
Answer: D) 14
The average salary of a company ‘s employees is ₹30000. If the average salary of male employees is ₹35000 and that of female employees is ₹25,000 what is the ratio of the number of male employees to female employees ?
A ) 1 :1
B) 2:1
C) 3:1
D) 4:1
Answer: C) 3:1
The average of five consecutive even numbers is 24. What is the largest number in the series?
A) 22
B) 24
C) 26
D) 28
Answer: D) 28
The average of 9 numbers is 12. If one number is excluded, the average becomes 11. What is the excluded number?
A) 9
B) 10
C) 11
D) 13
Answer: C) 11
The average of a group of 7 numbers is 25. If the average of the first 4 numbers is 22 and the average of the last 3 numbers is 30 what is the fifth number in the group ?
A) 20
B) 24
C) 26
D) 28
Answer: D) 28
The average of three numbers is 50. If two numbers are 40 and 60, what is the third number?
A) 45
B) 50
C) 55
D) 65
Answer: A) 45
The average weight of 5 friends is 60 kilograms. If one friend with a weight of 70 kilograms leaves the group, what is the new average weight?
A) 55 kilograms
B) 56 kilograms
C) 57 kilograms
D) 58 kilograms
Answer: C) 57 kilograms
The average height of a class is 170 centimeters. If the average height of boys is 175 centimeters, and that of girls is 160 centimeters , what is the ratio of the number of boys to girls?
A)3:1
B) 2:1
C) 1:1
D) 4:1
Answer: B) 2:1
The average of four numbers is 25. If three numbers are 20, 30, and 40, what is the fourth number?
A) 20
B) 25
C) 30
D) 35
Answer: B) 25
The average score of a student in 5 exams is 85.If the scores in the first four exams are 80, 90, 85, and 85 , what is the score in the fifth exam ?
A) 80
B) 85
C) 90
D) 95
Answer: D) 95
The average age of a family of five members is 40 years . If the average age of the parents is 45 years what is the average age of the three children?
A) 35 years
B) 40 years
C) 45 years
D) 50 years
Answer: A) 35 years
The average of five numbers is 18. If one number is excluded, the average becomes 20. What is the excluded number?
A) 16
B) 18
C) 20
D) 22
Answer: D) 22
The average salary of a company’s employees is $40000. If the average salary of male employees is $45000 and that of female employees is $35000 what is the ratio of the number of male employees to female employees?
A)4:1
B) 2:1
C) 3:1
D)1:1
Answer: C) 3:1
The average of six consecutive numbers is 15. What is the largest number in the series?
A) 12
B) 14
C) 16
D) 18
Answer: C) 16
The average of 8 numbers is 20. If one number is excluded, the average becomes 18. What is the excluded number?
A) 16
B) 18
C) 20
D) 22
Answer: D) 22
The average weight of 6 friends is 70 kilograms. If a new friend with a weight of 80 kilograms joins the group, what is the new average weight?
A) 70 kilograms
B) 75 kilograms
C) 77.5 kilograms
D) 80 kilograms
Answer: C) 77.5 kilograms
The average height of a class is 160 centimeters. If the average height of boys is, 165 centimeters and that of girls is 155 centimeters , what is the ratio of the number of boys to girls?
A) 1: 1
B) 2:1
C) 3:1
D) 4:1
Answer: B) 2:1
The average of three numbers is 15.If two numbers are 10 and 20 what is the third number ?
A) 5
B) 15
C) 25
D) 30
Answer: A) 5
The average score of a student in 4 exams is 80. If the scores in the first three exams are 85, 90, and 75, what is the score in the fourth exam?
A) 70
B) 75
C) 80
D) 85
Answer: D) 85
The average age of a family of four members is 30 years. If the average age of the parents is 35 years, what is the average age of the two children?
A) 25 years
B) 30 years
C) 35 years
D) 40 years
Answer: A) 25 years
The average of six numbers is 12. If one number is excluded, the average becomes 10. What is the excluded number?
A) 8
B) 10
C) 12
D) 14
Answer: D) 14
The average salary of a company’s employees is $30000 . If the average salary of male employees is $35000 and that of female employees is $25000 . what is the ratio of the number of male employees to female employees ?
A) 1 : 1
B) 2:1
C) 3:1
D) 4:1
Answer: C) 3:1
The average of five consecutive even numbers is 24. What is the largest number in the series?
A) 22
B) 24
C) 26
D) 28
Answer: D) 28
The average of 9 numbers is 12. If one number is excluded, the average becomes 11. What is the excluded number?
A) 9
B) 10
C) 11
D) 13
Answer: C) 11