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Mathematics, 06.05.2021 23:00 luisr0754

Helen took four tests, for which her mean score was 26. Later on, it was found that her score in the English test was wrongly recorded as 51 instead of 15. What was the
corrected mean score?

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Helen took four tests, for which her mean score was 26. Later on, it was found that her score in t...
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