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- Question
The mean of marks secured by 60 students in division A of class X is 64, 40 students of division B is 60 and that of 60 students of division C is 58. Find the mean of marks of the students of three divisions of Class X.
Options- A. 60.05
- B. 59.35
- C. 62.15
- D. 60.75
- Correct Answer
- 60.75
- 1. The mean of marks secured by 55 students in division A of class X is 58, 45 students of division B is 54 and that of 75 students of division C is 52. Find the mean of marks of the students of three divisions of Class X.
Options- A. 53.7
- B. 54.4
- C. 53
- D. 55.8 Discuss
- 2. The mean of marks secured by 30 students in division-A of class X is 67, 55 students of division-B is 63 and that of 40 students of division-C is 61. What is the mean of marks of the students of three divisions of Class X?
Options- A. 63.32
- B. 62.62
- C. 61.92
- D. 64.72 Discuss
- 3. The average revenues of 11 consecutive years of a company is Rs 69 lakhs. If the average of first 6 years is Rs 64 lakhs and that of last 6 years is Rs 76 lakhs, what is the revenue for the 6th year?
Options- A. Rs 83 lakhs
- B. Rs 79 lakhs
- C. Rs 77 lakhs
- D. Rs 81 lakhs Discuss
- 4. The average of 100 items was found to be 30 . If at the time of calculation , two items were wrongly taken as 32 and 12 instead of 23 and 11 , then the correct average is
Options- A. 29.8
- B. 29
- C. 29.9
- D. 29.5 Discuss
- 5. The average weight of Shubha, Govinda and Reshma is 65 kg. If the average weight of Shubha and Govinda be 63 kg and that of Govinda and Reshma be 70 kg, then the weight of Govinda is
Options- A. 41
- B. 71
- C. 88
- D. 46 Discuss
- 6. The average revenues of 7 consecutive years of a company is Rs 75 lakhs. If the average of first 4 years is Rs 70 lakhs and that of last 4 years is Rs 82 lakhs, what will be the revenue for the 4th year.
Options- A. Rs 85 lakhs
- B. Rs 83 lakhs
- C. Rs 81 lakhs
- D. Rs 79 lakhs Discuss
- 7. In a class of 66 students there are 33 girls. The average weight of these girls is 61 Kg and average weight of the full class is 66 kgs. What is the average weight of the boys of the class?
Options- A. 72
- B. 73
- C. 69
- D. 71 Discuss
- 8. The average of four consecutive odd numbers is 64. What is the value of largest number?
Options- A. 65
- B. 69
- C. 71
- D. 67 Discuss
- 9. In a school , 391 boys and 323 girls have been divided into the largest possible equal classes , so that each class of boys numbers the same as each class of girls . What is the number of classes ?
Options- A. 23
- B. 19
- C. 44
- D. 17 Discuss
- 10. The average of 9 observations was found to be 35. Later on, it was detected that an observation 81 was misread as 18. The correct average of the observations is
Options- A. 28
- B. 42
- C. 35
- D. 45 Discuss
Average problems
Search Results
Correct Answer: 54.4
Correct Answer: 63.32
Correct Answer: Rs 81 lakhs
Correct Answer: 29.9
Correct Answer: 71
Correct Answer: Rs 83 lakhs
Correct Answer: 71
Correct Answer: 67
Correct Answer: 17
Correct Answer: 42
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