The average of 18 observations is recorded as 124. Later it was found that two observations with values 64 and 28 were entered wrongly as 46 and 82. The correct average of the 18 observations is?
Explanation
Given,
Average of 18 observations is recorded as, 124
⇒18×24= 2232
Later, it was found that two observations with values 64 and 28 were entered wrongly as 46 and 82
Correct total of 18 observations
=2232-(46+82)+(64+28)
=2196
The correct average of the 18 observations=
Hence, Option B is correct.
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