The mean mark of 32 student in Economics is 52. The mean marks of top 6 is 31. Find out the mean marks of the other students.
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mean mark of 32 students = 52
→ sum of marks of 32 students / 32 = 52
→ sum of marks of 32 students = 52 x 32
→ sum of marks of 32 students = 1664.
and
mean marks of top 6 = 31
→ sum of marks of top 6 students /6 = 31
→ sum of marks of top 6 students = 31 x 6
→ sum of marks of top 6 students = 186
sum of marks of 26 students = sum of marks of 32 students - sum of marks of 6 top students
→ sum of marks of 26 students = 1664 - 186
→ sum of marks of 26 students = 1478
now we have to find mean marks of 32 - 6 students
→ total other students = 26
let us find mean marks of 26 students
→ mean of other students
= sum of marks of 26 students/26
= 1478/26 = 56.8
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