mean scored by 100 students was found to be 40 later on it discovered that a score of 53 was misread as83 .find correct mean
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Hi friend
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Your answer
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Mean score of 100 students = 40 (Incorrect mean)
Total sum of scores of 100 students = (100×40) = 4000 (Incorrect)
Wrong observation = 83
Correct observation = 53
Correct sum total of scores = (4000 - 83 + 53) = 3970
Therefore,
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Correct mean = 3970/100 = 39.7
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#ARCHITECTSETHROLLINS
✯ BRAINLY STAR ✯
--------------
Your answer
------------------
Mean score of 100 students = 40 (Incorrect mean)
Total sum of scores of 100 students = (100×40) = 4000 (Incorrect)
Wrong observation = 83
Correct observation = 53
Correct sum total of scores = (4000 - 83 + 53) = 3970
Therefore,
----------------
Correct mean = 3970/100 = 39.7
HOPE IT HELPS
#ARCHITECTSETHROLLINS
✯ BRAINLY STAR ✯
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