30. Mean of a class of 35 students in a Mathematics class test was found to
be 15. A chance was given to improve marks of those students who score
less than 8 marks. Three students score 3, 5 & 6 marks respectively. A
remedial class was taken by the teacher & then test was taken again. The
three students score 7,10,12 marks respectively in improvement test. What
will be the new mean of the class. What values of the teacher are depicted
here.
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the new Mean is 15.42857
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