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72
M: +2.50/-0.83

The average marks of 100 students are given to be 40. It was found later that marks of one student were 53 which were misread as 83. The corrected mean marks are

[Paper II (CSAT) Analysis 2019]
A
B
C
D

EXPLANATION

 Answer is (b). Given, average marks of 100 students = 40. So, total ...
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