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The average of eleven numbers is 54. The...

The average of eleven numbers is 54. The average of the first four numbers is 48 and that of the next four numbers is 25% more than the average of the first four. The ninth number is 8 greater than the 11th number and the tenth number is 4 greater than the 11th number. What is the average of the 9th and the 10th numbers?
11 संख्याओं का औसत 54 है | पहली चार संख्याओं का औसत 48 है तथा अगली चार संख्याओं का औसत पहली चार संख्याओं के औसत से 25% अधिक है | 9वीं संख्या 11वीं संख्या से 8 अधिक है तथा दसवीं संख्या 11वीं संख्या से 4 अधिक है | 9वीं और 10वीं संख्याओं का औसत ज्ञात करें |

A

54

B

52.6

C

56

D

54.4

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PINNACLE-AVERAGE-EXERCISE
  1. The average of thirteen numbers is 80. The average of the first five n...

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  2. The average of twelve numbers is 46. The average of the first four num...

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  3. The average of eleven numbers is 54. The average of the first four num...

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  4. Three numbers are such that if the average of any two of them is added...

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  5. The average of twelve numbers is 55.5. The average of the first four n...

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  6. The average marks of 50 students in a class was found to be 64. If the...

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  7. The average marks of 45 students was found to be 66. If the marks of t...

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  8. In a class of 50 students, 46% are girls and the remaining are boys. T...

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  9. In a class of 60 students, 40% are girls. The average weight of the bo...

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  10. In a class of 60 students, 40% are girls. The average weight of the wh...

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  11. In a class of 40 students, 60% are girls. The average of the girls’ ma...

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  12. In a class of 50 students, 60% are boys. The average of marks of the b...

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  13. In a class of 50 students, 40% are girls. The average marks of the who...

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  14. There are three numbers. If the average of any two of them is added to...

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  15. There are 90 students in a class, out of which 70% are from village A ...

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  16. In a class of 80 students, 60% participate in games and the rest do no...

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  17. The total number of students in class A and B is 96. The number of stu...

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  18. The average weight of a certain number of persons in a group was 75.5 ...

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  19. In a class of 80 students, the ratio of the urban to the rural is 5 : ...

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  20. The average of n number is 36. If each of 75% of the numbers is increa...

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