Lec 11 Mercury Cell, Chap 03 12th Chemistry

Discussion OF Level-2 || Mercury Cell and Fuel Cell

Organic Chemistry पढ़ने का Best Trick | 12th Chemistry | Organic Chemistry | Important Topic in Board

Class 12 Chemistry | Chapter 5 | Surface Chemistry | Important Questions | CBSE Boards Revision | Part 1

Class 12 Chemistry | Chapter 5 | Surface Chemistry | Important Questions | CBSE Boards Revision | Part 2

Class 12th Start Date

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 |