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 3,5and6 marks respectively.A remedial class was taken by the teacher and then test was taken again.The three students 7,10and12 marks respectively in improvement test.What will be the new mean of the class?What values of teacher are depicted here?(4 marks)
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