The average of 10 observations is 40. It was realised later that an observation was misread as 31 in place of 50. Find the correct average.
Given:
Average of 10 observations = 40
Incorrect observation = 31
Correct observation = 50
Formula Used:
Average =
Solution:
Total sum of observations = 10 × 40 = 400
Correct total = 400 − 31 + 50 = 419
Correct average = = 41.9
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90 Mins English English100 Questions100 Marks90 Mins English English40 Questions30 Marks25 Mins EnglishThe average of 10 observations is 40. It was realised later that an observation was misread as 31 in place of 50. Find the correct average.
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