Given below are marks obtained by 20 students of a class in a test. 17, 24, 30, 21, 5, 18, 19, 13, 7, 8, 31, 35, 19, 18, 21, 13, 28, 5, 10, 16. Prepare a frequency table using tally marks such that 20-30 is class interval.
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40 plus Is triangle answer is 24
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