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Question 53
The average weight of 25 bags is 55 kg. The weight of one bag was misread as 65 instead of 56. Find the correct mean value.
Solution
Total weight of 25 bags = $$25\times55=1375$$
Total weight after correction = 1375 - 65 + 56 = 1366
Correct mean value = $$\frac{1366}{25}=54.64$$.
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