### Mathematics Class X

Real Numbers
Polynomials
Quadratic Equations
Arithmetic Progressions
Triangles
Coordinate Geometry
Introduction to Trigonometry
Circles
Constructions
Areas Related to Circles
Surface Areas and Volumes
Statistics
Probability

# Mean of Grouped Data (Without Class-Interval)

If the data is organized in such a way that there is no class interval then we can calculate the mean by

where, are the observations

are the respective frequencies of the given observations.

Here, are respectively and are respectively.

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