How to prepare for the CBSE Class 12 Board Exam? In this lesson, I will teach you how to prepare for the CBSE Class 12 Board Exam. Your class 12 board exam is probably the most important exam in your...
Arithmetic Progression Example Q: The sums of n terms of two arithmetic progressions are in the ratio 5n+4:9n+6. Find the ratio of their 18th terms. ...