if the arithmethic mean of 200 values is 15 then sum of tjese 200 valus is ?
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Answer:
Mean of 200 observations = 50
Sum of 200 observations = 50×200 = 10000
After replacing the misread observation 92 to 192 and 8 to 88
Sum of 200 observations = 10000−92+192−8+88 = 10180
New mean =
200
10180
= 50.9
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