RS agarwal chapter data handling
Kindly refer the link for your query.
https://www.meritnation.com/cbse-class-7/math/rs-aggarwal-2018/collection-and-organisation-of-data(mean-median-and-mode)/textbook-solutions/9_1_3361_24245_263_51931
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https://www.meritnation.com/cbse-class-7/math/rs-aggarwal-2018/collection-and-organisation-of-data(mean-median-and-mode)/textbook-solutions/9_1_3361_24245_263_51931
Regards