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InterviewSolution
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The Mean Of 40 Numbers Was Found To Be 38. Later On, It Was Detected That A Number 56 Was Misread As 36. Find The Correct Mean Of Given Numbers. |
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Answer» Calculated mean of 40 numbers = 38. Therefore, calculated SUM of these numbers = (38 × 40) = 1520. Correct sum of these numbers = [1520 - (wrong ITEM) + (correct item)] = (1520 - 36 + 56) = 1540. Therefore, the correct mean = 1540/40 = 38.5. Calculated mean of 40 numbers = 38. Therefore, calculated sum of these numbers = (38 × 40) = 1520. Correct sum of these numbers = [1520 - (wrong item) + (correct item)] = (1520 - 36 + 56) = 1540. Therefore, the correct mean = 1540/40 = 38.5. |
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