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The marks of 30 students of a class of 1...

The marks of 30 students of a class of 10 in a test (out of 75) are given below
40, 21, 50, 37, 42, 37, 38, 42, 49, 52, 38, 53, 57, 47, 29,
59, 61, 33, 17, 17, 39, 44, 42, 39, 14, 7, 27, 19, 54, 51.
Form a frequency table with equal class intervals.

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