The mean marks scored by 50 students was found to be 39. Later, it was found that a score of 75 was misread as 25. Find the correct mean?
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Answer:
correct mean = 40
Step-by-step explanation:
sum of marks =s
s/50=39
s=1950
increase in s = 75-25=50
new s=2000
correct mean = 2000/50
=40
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