Q7 of 55 Page 340

Let us find the mean of the following data by direct method.

Arithmetic mean is just the average value of the data or variables given in the data.


Let’s create a table showing frequencies and fixi.



So, we have


∑fixi = 4030


∑fi = 100


Using the direct method, we have the formula for arithmetic mean.



Using the above values, we get



⇒ Mean = 40.3


Thus, mean is 40.3.

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