Answer :
Final answer:
The modal class, which is the class interval with the highest frequency, in the given frequency distribution is 20-25, as it has the highest frequency of 75.
Explanation:
The modal class in a frequency distribution is the class interval with the highest frequency. In this specific question, the frequency distribution of class intervals are 10-15, 15-20, 20-25, 25-30, 30-35, 35-40, with respective frequencies of 30, 35, 75, 40, 30, and 15. It is evident from the given frequencies that the class interval 20-25 has the highest frequency of 75, so it's the modal class of this distribution.
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