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The mean marks of 10 sstudents. in. aclass is70 the students are divided into tow groups of 6 andd 4 respectively. of the mean marks of the first group is

60 what will be the mean marks of the second group?


85. if the mean of 10 students are 70 then the total sum of marks will be 70*10=700. then the sum of the marks of the 6 students ill be 6*60=360. so the total sum of marks of the 4 students ill be 700-360=340. mean= 340/4=85
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