Class 10 Math All topics Statistics
The following frequency distribution gives the monthly consumption of electricity of consumers of a locality. Find the median, mean and mode of the data and compare them.
 Monthly consumption(in units): No. of consumers
Solution:

lower limit of the modal class

size of the class intervals

frequency of the modal class

frequency of the class preceding the modal class

frequency of the class succeed in the modal class.

We have, and
The cumulative frequency just greater than is then the median class is such that,

We know,

Here the maximum frequency is 20, then the corresponding class is the modal class

Now, after comparing all three values, we get following relation,

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Get answers to your doubts.
introduction to trigonometry
functions
some applications of trigonometry
quadratic equations
surface areas and volumes