Please copy and paste following link
https://byjus.com/maths/mean-median-mode/
https://byjus.com/rs-aggarwal-solutions/rs-aggarwal-class-10-solutions-mean-median-mode/
https://byjus.com/rs-aggarwal-solutions/rs-aggarwal-class-10-solutions-chapter-9-mean-median-mode-exercise-9-3/
https://byjus.com/rs-aggarwal-solutions/rs-aggarwal-class-10-solutions-chapter-9-mean-median-mode-exercise-9-4/