Question belong to SNAP 2009
Probability
Level
2
If the algebraic sum of deviations of 20 observations measured from 23 is 70 , mean of these observations would be.......
The answer is 26.50.
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1 solution
sum of the deviations is 70.... that means the sum of 20 observations is 23*20+70= 530 and the mean is 530/20=26.50