Mean of a series with 50 terms to 80; But afterwards it was noted that three terms 63, 47 and 8 were misread as 36,74 and 63. Find correct
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Step-by-step explanation:
When misread as 36,74 and 63 mean of 50 terms = 80
total sum= 50*80= 4000
Correct terms are 63, 47 and 8. so 63-36= 27
47-74= - 27
8-63= -53
So net is 27-27-53=-53 from total to yield= 4000-53= 3947 is the correct mean
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