Questions based on the variance of a discrete frequency distribution are there in exercise 32.5 of class 11 RD Sharma Maths. The solutions of this chapter are available here and you can use them as standard reference material. It will not only help them to improve their concepts but also introduce them to different methods to solve the questions.
These solutions are developed in a simple manner to help students like you understand all the involved concepts. The RD Sharma solutions available on eCareerPoint is one of the best references that you can get online. Below on this page you can easily find the links to the solutions of exercise 32.5 from RD Sharma Class 11 Maths and download it in PDF.
Statistics Exercise 32.5:Download
