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The mode of an ungrouped frequency distribution can be determined if the value of an item having maximum number of frequency.
Example:
Find the mode of the following data.

 Height (in cm) $$145$$ $$150$$ $$162$$ $$132$$ $$138$$ Number of students $$5$$ $$6$$ $$12$$ $$25$$ $$3$$

Solution:

Here, the number of students is the frequency. The maximum frequency is $$25$$.

Therefore, the height having the maximum number of frequency is $$132$$ $$cm$$.

Hence, $$132$$ is the mode.