01 For New Students || Class 11th || chapter 01 Some Basic Concepts of Chemistry

NCERT Updates - Class 11 th

NCERT Updates - Class 11 th

New Ncert Updates-Class XI th

New Ncert Updates-Class XI th

Class 11 Most Important Chapters for Class 12

New Ncert Updates-Class XII th

New Ncert Updates-Class XII th

Why Class 11th is Very Important?

The average age of 30 students of a class is 14 years 4 months. After admission of 5 new student in the class the average becomes 13 years 9 months. The youngest one of the five new students is 9 years 11 months old. The average age of the remaining 4 new students is :