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The number of books in different shelves of a library are as follows: 25, 27, 32, 24, 28,
34, 20, 25, 28, 30,20, 35, 25, 27, 31,37, 22, 24, 27, 28,27, 20, 36, 21, 20,29, 30, 29, 36, 30Prepare a frequency distribution table with class size 4 for the data given above taking the first interval as 18–22. (22 not included).
