Here, we list all formulas that are required for Class 9 and 10 Exams
The formula list includes
 Range

Mean
 Mean of Raw Data
 Mean of Discrete Data
 Mean of Grouped Data

Median
 Median of Raw Data
 Median of Discrete Data
 Median of Grouped Data

Mode
 Mode of Raw Data
 Mode of Discrete Data
 Mode of Grouped Data
Range
Range = Maximum value – Minimum Value
For data
5, 10, 15, 18, 21, 24, 24, 13, 2, 9, 9, 18, 18, 32, 28, 3, 14, 25, 3, 27
Maximum value = 32
Minimum value = 2
Thus,
Range = 32 – 2 = 30
Mean of Raw, Discrete and Grouped Data
Median of Raw, Discrete and Grouped Data
We can also find median using Ogive curve
We draw less than and more than ogive,
and their intersection is the median
Mode of Raw, Discrete and Grouped Data