The mean marks scored by 40 students were found to be 60.later it was observed that a score of 48 was misread as 84. then the correct mean is
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calcυlaтe мean oғ 40 ѕтυdenт =60
calcυlaтe ѕυм oғ тнeѕe ѕтυdenт мarĸѕ =40×60=2400
correcт ѕυм oғ тнeѕe ѕcore =2400-84+48
=2448-84
=2364
ѕo, тнe correcт мean =2364/40
=59.1
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51.9
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