AVERAGE MCQ SET 5
1. The average weight of 8 students is 48 kg . If four students of average weight 44 kg and four students of average weight 58 kg is also added , then find the average weight of 16 students .
(a) 49.5 kg
(b) 49 kg
(c) 48.5 kg
(d) 48 kg
Answer: A
2. The average age of 21 students in a class is 14 . If the age of the principal and their teacher who is 5 years younger than their principal , is added , the average becomes 17 . Find the age of the principal in years .
(a) 51
(b) 53
(c) 46
(d) 48
Answer: A
3. The average age of a group of friends is 27 years . If 4 new friends whose average age is 25 years join them , the average age of the entire group becomes 26 years. How many people were there in the group initially ?
(a) 3
(b) 4
(c) 5
(d) 6
Answer: B
4. The average age of 10th class students is 16.5 years . 15 new students with an average age of 16 years join the class , therefore decreasing the average age by 0.125 years . The original strength of the class was :
(a) 54
(b) 48
(c) 45
(d) 52
Answer: C
5. The average height of 8 students of division A is x . If 4 students of average height 156 cm join , the average height of division A increases by 2/3 cm . Find the average height (in cm) of the first 8 students in division A .
(a) 153 2/3
(b) 154 1/3
(c) 154
(d) 153
Answer: C
6. Average of 15 numbers is 53 . A number is removed and the average of 14 numbers now becomes 55 . Which number was removed?
(a) 26
(b) 23
(c) 25
(d) 24
Answer: C
7. The average of five numbers is 30 . If one number is excluded , the average becomes 31 . What is the excluded number ?
(a) 26
(b) 24
(c) 31
(d) 30
ย Answer: A
8. There are 15 students in a class . Their average weight is 40 kg . When one student leaves the class , the average weight is 39.5 kg . What is the weight of the student who left the class (where kg means kilogram) ?
(a) 47 kg
(b) 42 kg
(c) 52 kg
(d) 48 kg
Answer: A
9. In a hotel , there are 120 staff members . Their average weight is 62.5 kg . When one of the staff members leaves the hotel , the average weight is reduced by 250 g . Find the weight of the staff member who left the hotel .
(a) 64.25 kg
(b) 78.75 kg
(c) 90.50 kg
(d) 92.25 kg
Answer: D
10. The average score in mathematics of a class of 36 students is 60 . If the top two scores are excluded , the average goes down by 2 . If the second highest score of the class is 90 . Find the highest score of the class .
(a) 96
(b) 99
(c) 98
(d) 95
Answer: C
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