Alligation MCQ Set 6

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

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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

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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

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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

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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

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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

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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

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 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

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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

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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 was  30% more than that of students in B . The average score of students in B is :

(a) 60

(b) 54

(c) 50

(d) 56

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Answer: B