Example Marks : 40 -50 30- 40 20-30 10-20 0 -10

No. of students :   10          12        40        30      8

Solution :

By interpolation

Aliter

Arranging the series in the descending order (as it is given)

Index

4.1 Introduction
4.2 Arithmetic Mean
4.3 Properties of Arithmetic Mean
4.4 Median
4.5 Mode
4.6 Empirical relation between mean, median & mode

Chapter 5