Question

mean of a class of 35 students in mathematical class test was found to be 15 a chance was given to improve marks of those students scored less than 8 marks Three Students scored 3 , 5 And 6 marks respectively remedial class was taken by the teacher and then test was taken again the 3 student score 7, 10, 12 marks respectively in improvement trust what will be the new mean of class what values of the teacher are detected here

Answer 1

mean of 35 students=15
sum of marks of 35 students=15*35
                                             =525
sum of marks except three students=525-3-5-6
                                                         =511
sum of marks after improvement=511+7+10+12
                                                    =540
new mean of class=540/35
                              =15.42

Answer 2

Answer:

Step-by-step explanation: