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The mean of the marks scored by 50 students was found to be 39 later on, it was observed that a score was 43 was misread as 23 find the correct mean.A. 38.6B. 39.4C. 39.8D. 39.2 |
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Answer» Correct Answer - b calculated sum =` ( 39 xx 50) = 1950` correct sum = ( 1950 +43-23) =1970 Correct mean = `1970/50 = 39.4` |
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