77.5> 84 The data given below shows the cumulative frequency of students' grades in a class 72.5> 64 67.5> 46 62.5 > 19 57.5> 6 Grades Cumulative Frequency Reference: freq The best graph for representing the data shown in the previous table is called .frequency polygon .A O histogram .BO .time series graph.CO .ogive.D

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