Removed value less than initial Avg.
The average of marks scored by a group
of 11 students in Maths is 75. Find the
average marks scored by them if one
student who scored 13 marks is
removed from the group.
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Step-by-step explanation:
Average of marks scored by a group of 11 students in Maths is 75 so total of all marks scored by 11 students in Maths is 75×11 => 825 marks. One student who scored 13 marks was removed which total of remaining 10 students'marks in maths => 825-13 =>812. Average of the 10 students' marks in maths is 812/10 => 81.2. Hope it helps you.
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