1.

The mean of 100 observation is 50. If one of the observation which was 50 is replaced by 150, the resulting mean will beA. 50.5B. 51C. 51.5D. 52

Answer» Correct Answer - b
Resulting sum = `( 50 xx 100 -50 +150) =( 5150 -50) = 5100`
Resultingh mean = `5100/100 = 51`


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