What is the mean for the marks 85 ,76 ,90 ,85 ,39 ,48 ,56 ,95 ,81 ,75 (out of 100) of 10 students?
(a) 65
(b) 75
(c) 90
hint :
Using this formula :
Total marks
__________
Total students
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85+76+90+85+39+48+56+95+81+75÷10=
750÷10=75
therefore we can get mean as 75
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