Home
Class 14
MATHS
Average of 13 numbersis 40. If average o...

Average of 13 numbersis 40. If average of first 7 numbers be 42 and that of last 7 be 35,find the 7th number.

A

10

B

20

C

15

D

19

Text Solution

Verified by Experts

Promotional Banner

Similar Questions

Explore conceptually related problems

The average of six numbers is 30. If the average of first four is 25 and that of last three is 35, the fourth number is:

The average of 13 numbers is 48.5. The average of the first five numbers is 56.4 and that of the last nine numbers is 45.6. what is the 5^(th) number ?

The average of 13 numbers is 48.5. The average of the first five numbers is 56.4 and that of the last nine numbers is 45.6. What is the 5^(th) number?

The average of twelve numbers is 46. The average of the first four numbers is 43 and that of the last five numbers is 49.4. The 5th and the 6th numbers are respectively 4 and 6 more than the 7th number. What is the average of the 5th and the 7th numbers? बारह संख्याओं का औसत 46 है | पहली चार संख्याओं का औसत 43 तथा अंतिम पांच संख्याओं का औसत 49.4 है | 5वीं और छठी संख्या सातवीं संख्या से क्रमशः 4 और 6 अधिक है | 5वीं और 7 वीं संख्या का औसत ज्ञात करें |

The average of nine numbers is 50. The average of the first five numbers is 54 and that of the last three numbers is 52. Then, the sixth number is

Average of 13 number is 52. Average of first 7 number is 51. Average of last 7 number is 54. Find 7^(th) number.

The average of 11 numbers is 63.If the average of first six numbers is 60 and the last six numbers is 65, then the 6th number is