Average
| 16. | In a team of 8, comprising of equal boys and girls, boys eat on average 72 kg of food and girls eat on an average 50 kg of food. A new girl joined the team and the average consumption became 67 kg. How much did new girl eat (in kgs)? |
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A. 115 kg
B. 105 kg
C. 110 kg
D. 90 kg
View Answer Discuss Work SpaceAnswer: option a
Explanation:
| 17. | In an examination, average marks for the entire class was 80. If 10% of the students scored 95 marks and 20% scored 90 marks, then, average marks of the remaining students of the class is: |
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A. 80
B. 75
C. 70
D. 90
View Answer Discuss Work SpaceAnswer: option b
Explanation:
| 18. | In an examination, the average marks was found to be 50. After deducting computational errors, the marks of the 100 candidates had to be changed from 90 to 60 and the average marks came down to 45. Total No of candidates who took the examination were: |
|---|
A. 450
B. 600
C. 500
D. 400
View Answer Discuss Work SpaceAnswer: option b
Explanation:
| 19. | The average marks of Akrit decreased by one, when he replaced the subject in which he has scored 40 marks by the other two subjects in which he has scored 23 and 25 marks respectively. Later, when he also included 57 marks of Maths, the average marks increased by two. How many subjects were there initially? |
|---|
A. 18
B. 16
C. 12
D. 15
View Answer Discuss Work SpaceAnswer: option d
Explanation:
| 20. | In the morning, a student reads 100 pages at the rate of 60 pages per hour. In the evening, she reads next 100 pages at the rate of 40 pages per hour. Her average rate of reading, in pages per hour is: |
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A. 60
B. 50
C. 48
D. 45
View Answer Discuss Work SpaceAnswer: option c
Explanation:
Time taken to read = 100 minutes (to read 100 pages @60 pages/hr) + 150 minutes (to read 100 pages @40 pages/hr)
Average speed = 200/250 pages/minutes = 48 pages/hr
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