Q. 15.0( 6 Votes )

The mean mark obtained by 7 students in a group is 226. If the marks obtained by six of them are 340, 180, 260, 56, 275 and 307 respectively, find the marks obtained by the seventh student.

Answer :

Given,


Mean marks of 7 students = 226


Total marks of 7 students = 7×226 = 1582


Total marks of 6 students = (340 + 180 + 260 + 56 + 275 + 307)


Marks of the 7th students = (total marks of 7 students) - (total marks of 6 students)


= 1582 – 1418 = 164


Hence the marks of the 7th student are 164.


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