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The mean of marks scored by 100 students was found to be 40. Later on it was discovered that a score of 53 was misread as 83. Find the correct mean.How do

you so,ve this?


The Brainliest Answer!
Mean score = 40

mean=sum of observation /no of observations
sum of observations = mean x no of observations
that is 40 x 100
           = 4000

after replacement, sum of new observation=4000-83+53

mean of new observation = 3970/100

2 3 2
is the answer right?
The new sum is 3970 not 4970
oh i am really sorry...there is some problem with my keyboard
the ranswer is 3970
ya you may edit it
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