The mean of 8 observations was found to be 30. Later it was detected that one observation 64 was mistakenly read as 24. Find the correct mean.
Please solve this sum for me.
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Mean of 8 observations= 30
Sum of 8 observations= 30× 8= 240
Correct sum of 8 observations = 240 - (wrongly read ) + correct number
Correct sum of 8 observations = 240 - 24+ 64
= 240+64-24= 304 - 24 = 280
Correct Mean= correct Sum of 8 observations/ total number of observations
Correct mean = 280 /8= 35
Correct mean = 35
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