Home
Class 14
MATHS
The average of 8 numbers is 20, that of ...

The average of 8 numbers is 20, that of the first two is 15.5 and that of the next three is `21frac(1)(3)`, the 6th is less than the 7th by 4 and 7 less than the 8th. The last number is

A

1) 25

B

2) 28

C

3) 32

D

4) 35

Text Solution

Verified by Experts

Promotional Banner

Similar Questions

Explore conceptually related problems

The average of 8 numbers is 20. The average of first two numbers is 15(1)/(2) and that of the next three is 21(1)/(3). If the sixth number be less than the seventh and eighth numbers by 4 and 7 respectively,then the eighth numbers by 4 and 18 (b) 22 (c) 25 (d) 27

The average of 8 numbers is 20. The average of first tow numbers is 15 (1)/(2) and that of the next three is 21 (1)/(3) . If the sixth number be less that the seventh and eight numbers by 4 and 7 respectively, then the eighth number is :

The average of 8 numbers is 20. the average o first two number is 15(1)/(2) and that of next three is 21(1)/(3) . If the sixth numbet be less than the seventh and eighth numbers by 4 and 7 respectively, then find the eighth number?

The average of 18 numbers is 52. The average of first 8 numbers is 62 and the average of the next 7 numbers is 45. If the 16th number is 6 less than the 17th number and the 17th number is one more than the 18th number then what is the average of 16th and 18th number? 18 संख्याओं का औसत 52 है | पहली 8 संख्याओं का औसत 62 तथा अगली 7 संख्याओं का औसत 45 है | यदि 16वीं संख्या 17वीं संख्या से 6 कम है तथा 17वीं संख्या 18वीं संख्या से एक अधिक है, तो 16वीं और 18वीं संख्या का औसत ज्ञात करें |

The average of 8 readings is 24.3. Out of which the average of first two is 18.5 and that of next three is 21.2. If the sixth reading is 3 less than seventh and 4 more than eighth, what is the sixth reading?

The average of twelve numbers is 42. The average of the last five numbers is 40 and that of the first four numbers is 44. The 6th number is 6 less than the fifth and 5 less than the 7th number. The average of the 5th and the 7th numbers is: बारह संख्याओं का औसत 42 है | अंतिम पांच संख्याओं का औसत 40 तथा पहली चार संख्याओं का औसत 44 है | छठी संख्या पाँचवीं से 6 कम है तथा 7वीं संख्या से 5 कम है | 5वीं और 7वीं संख्या का औसत है :

The average of 11 numbers is 10.8. If the average of the first six be 10.4 and that of the last six is 11.5, then the middle (6th) number is

The average of 20 numbers is 80. The average of first 10 numbers is 76.5 and that of next 7 numbers is 82. The 18th number is 3 more than the 19th number but 3 less than the 20th number. What is the average of 18th and 19th numbers? 20 संख्याओं का औसत 80 है | पहली 10 संख्याओं का औसत 76.5 है तथा अगली 7 संख्याओं का औसत 82 है | 18वीं संख्या 19वीं संख्या से 3 अधिक है लेकिन 20वीं संख्या से 3 कम है | 18वीं तथा 19वीं संख्या का औसत ज्ञात करें |