CBSE Class 7 Answered
Mean of 7 numbers was found to be 50. Later on it was detected that a number 72 was misread as 27. Find the correct mean of the observations.
Asked by Topperlearning User | 11 Nov, 2013, 02:10: AM
Expert Answer
Given mean of 7 numbers = 50
Sum of 7 numbers = 50 × 7 = 350
But 72 was read as 27
Correct sum of 7 numbers = 350 - 27 + 72 = 395
Thus, Correct mean =
Sum of 7 numbers = 50 × 7 = 350
But 72 was read as 27
Correct sum of 7 numbers = 350 - 27 + 72 = 395
Thus, Correct mean =
Answered by | 11 Nov, 2013, 04:10: AM
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