The Mean of 72 Items Was Found to Be 63. If Two of the Items Were Misrecorded as 27 and 9 Instead of 72 and 90 Respectively, Find the Correct Mean. - Mathematics
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The mean of 72 items was found to be 63. If two of the items were misrecorded as 27 and 9 instead of 72 and 90 respectively, find the correct mean.
Error in sum`=72+90-27-9=126`
The error means `=126/72=1.75`
Concept: Arithmatic (Entrance Exam)
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