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The average of eleven numbers is 68. The...

The average of eleven numbers is 68. The average of the first four numbers is 78 and that of the next four numbers is 63. The 9th number is two times the 11th number and 10th numbers is 4 less than the 11th number. What is the average of the 9th and 11th numbers ?

A

72.6

B

70.1

C

72.2

D

70.5

Text Solution

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The correct Answer is:
D
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The average of eleven numbers is 68. The average of the first four numbers is 78 and that of the next four is 63. The 9^(th) number is two times the 11^(th) number and the 10^(th) number is half of the 11^(th) number. What is the average of the 9^(th) and 11^(th) numbers ?

The average of thirteen numbers is 47. The average of the first three numbers is 39 and that of the next seven numbers is 49. The 11th number is two times the 12th number and 12th number is 3 less than the 13th number. What is the average of 11th and 13th numbers? तेरह संख्याओं का औसत 47 है | पहली तीन संख्याओं का औसत 39 है तथा अगली सात संख्याओं का औसत 49 है | 11वीं संख्या 12वीं संख्या से दोगुनी है तथा 12वीं संख्या 13वीं संख्या से 3 कम है | 11वीं और 13वीं संख्याओं का औसत ज्ञात करें |

The average of twelve numbers is 45.5. The average of the first four numbers is 41.5 and that of the next five numbers is 48. The 10th number is 4 more than the 11th number and 9 more than the 12th number. What is the average of the 10th and 12th numbers? बारह संख्याओं का औसत 45.5 है | पहली चार संख्याओं का औसत 41.5 है तथा अगली पाँच संख्याओं का औसत 48 है | 10वीं संख्या, 11वीं संख्या से 4 अधिक तथा 12वीं संख्या से 9 अधिक है | 10वीं तथा 12वीं संख्याओं का औसत कितना है ?

The average of thirteen numbers is 80. The average of the first five numbers is 74.5 and that of the next five numbers is 82.5. The 11th number is 6 more than the 12th number and the 12th number is 6 less than the 13th number. What is the average of the 11th and the 13th numbers? तेरह संख्याओं का औसत 80 है | पहली पांच संख्याओं का औसत 74.5 और अगली पांच संख्याओं का औसत 82.5 है | 11वीं संख्या 12वीं संख्या से 6 अधिक है तथा 12वीं संख्या 13वीं संख्या से 6 कम है | 11वीं तथा 13वीं संख्याओं का औसत ज्ञात करें |

The average of ten numbers is 72. The average of the first four numbers is 69 and that of the next three numbers is 74. The 8^(th) number is 6 more than the 9^(th) number and 12 more than the 10^(th) number. What is the average of the 8^(th) and 9^(th) numbers?

The average of thirteen numbers is 47. The average of the first three numbers is 39 and that of next seven numbers is 49. The 11^(th) number is two times the 12^(th) number and 12^(th) number is 3 less that the 13^(th) number. What is the average of 11^(th) and 13^(th) numbers ?

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The average of 24 numbers is 26. The average of the first 15 numbers is 23 and that of the last 8 number is 33. Find the 16^(th) number.

GAGAN PRATAP -AVERAGE-Multiple Choice Questions
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  2. Three numbers are such that if the average of any two of them is added...

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  3. The average of eleven numbers is 68. The average of the first four num...

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  4. The average of thirteen numbers is 80. The average of the first five n...

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  5. The average of 24 numbers is 56. The average of the first 10 numbers i...

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  6. The average marks of 30 boys is 88, and when the top scores were exclu...

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  7. A batsman scores 92 runs in his 15th innings, which increases his batt...

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  8. A batsman makes 100 runs in the 25th match of his career. His average ...

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  9. The average run of a batsman in his 23 matches is 62. He scores 122 in...

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  10. A cricket batsman had certain average of runs in his 91 innings. In th...

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  11. A cricketer had a certain average of runs for his 64 innings. In his 6...

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  12. A batsman scores certain runs in 72 innings. In next two innings he sc...

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  13. A batsman scores 556 run in 26th, 27th, 28th and 29th innings together...

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  14. The batting average for 40 innings of a cricket player is 50 runs. His...

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  15. A cricketer whose bowling average is 24.85, runs per wicket, takes 5 w...

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  16. The bowling average of a cricketer was 12.4. He improves his bowling a...

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  17. The average run rate of a cricket team during the first 20 overs is 4....

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  18. A and B have their annual average income Rs. 80,000. B and C have thei...

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  19. The average weight of L, M and N is 93 kg. If the average weight of L ...

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  20. The average weight of A,B and C is 65 kg. If the average weight of C a...

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