ALLIGATION MCQ SET 6
1. The average weight of 16 boys in a class is 60.25 kg and that of the remaining 10 boys is 45.75 kg . The average weight of all boys in the class is :
(a) 56.27
(b) 55.37
(c) 54.67
(d) 53.76
Answer: C
2. In a class of 50 students , 46% are girls and the remaining are boys . The average os the boys marks is 58 and that of the girls is 62 girls . What are average marks of the whole class ?
(a) 59.84
(b) 60.65
(c) 60.38
(d) 60.12
Answer: A
3. The number of students in classes A and B are 60 and 70 , respectively . The average score in mathematics of students in B is 57 and that of all students in A and B is 63 . What is the average score of students in A?
(a) 69
(b) 70
(c) 68
(d) 71
Answer: B
4. In a class of 60 students , 40% are girls . The average weight of the whole class is 59.2 kg and the average weight of the girl is 55 kg . What is the average weight of the boys ?
(a) 63 kg
(b) 60 kg
(c) 61 kg
(d) 62 kg
Answer: D
5. The average weight of 8 gold coins is 20 grams per coin . The average weight of 12 coins of silver is 35 gram per coin . What is the average weight per coin for 2 coins?
(a) 25 g
(b) 29 g
(c) 21 g
(d) 31 g
Answer: B
6. In a class of 80 students , 60% participate in games and the rest do not . The average weight of the former group is 5% more than that of the latter . If the average weight of all the students is 51 1/2 kg , then what is the average weight (in kg) of the former group ?
(a) 57.6
(b) 54.5
(c) 60
(d) 52.5
Answer: D
7. The average age of 210 students in a group is 13.56 years , 35% of the number of students are girls and the rest are boys . If the ratio of the average age of boys and girls is 6.5 , then what is the average age (in years) of the girls?
(a) 12
(b) 11.6
(c) 10
(d) 14.4
ย Answer: A
8. In a class of 80 students , the ratio of the urban to the rural is 5 : 3 . In a test , the average score of the rural students is 40% more than that of the urban students . If the average score of all the students is 69 , then what is the average score of the rural students ?
(a) 80
(b) 76
(c) 92
(d) 84
Answer: D
9. The number of students in section A and B of the class are 40 and 52 respectively . The average score in mathematics of all students is 75 . If the average score of the students in A is 20% , more than that of students in B , then what is the average score of students in B?
(a) 65
(b) 63
(c) 71
(d) 69
Answer: D
10. The average score in Mathematics of 90 students of section A and B of class IX was 63 . The number of students in A were 10 more than those in B . The average score of students in A wasย 30% more than that of students in B . The average score of students in B is :
(a) 60
(b) 54
(c) 50
(d) 56
Answer: B
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