Question

In mathematics test given to 20 students,the following marks are recorded. 75,62,88,55,90,95,85,69,60,78,44,53,89,92,97,71,48,56,84,73.
Prepare a grouped frequency distribution table with classes of equal sizes using 40-45,45-50 for the above data. Find the number of classes in the distribution.
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Answer 1

Answer:

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