the mean of 200 items was 50 later on it was discovered that two times one is read as 83 find the correct mean
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As the mean of 200 items is 50. So,
Total items= 200*50 = 10000.
Now,
Difference of items due to misread
= (192-92 )+ (88-8) = 100 + 80 = 180.
Then, Add 180 to the total value
i.e. 10000+180 = 10180.
So, Correct mean= 10180/200 = 50.9
Hope you will find it helpful....
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