The mean of the marks obtained by 100 students is 60. If the marks obtained by one of the students was incorrectly calculated as 75, whereas the actual mark obtained by him was 65, then what is the correct mean of the marks obtained by the students?
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Answer:
its 59.90
Step-by-step explanation:
mean = sum of marks/ total students
60=sum of marks/100 sum of marks =60×100=6000
6000-75+65=5990
now new mean marks will be 5990/100=59.90
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