find the mean median and mode. marks 1-10,11-20, 21- 30, 31- 40, 41-50,51-60. frequency- 4,3,7,6,3,2
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find the mean median and mode. marks 1-10,11-20, 21- 30, 31- 40, 41-50,51-60. frequency- 4,3,7,6,3,2
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