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mean =Sum of observations/ Number of observations So, if mean of 100 observations is 50 , then sum of hundred observations = No of observations Mean = 100 50 =5000 Now ,An observation 50 was replaced by 150 . So new sum of observations =5000-50+150 = 5000+100 = 5100 New mean =5100/100 ... read more

mean =Sum of observations/ Number of observations So, if mean of 100 observations is 50 , then sum of hundred observations = No of observationsÃ— Mean = 100Ã—50 =5000 Now ,An observation 50 was replaced by 150 . So new sum of observations =5000-50+150 = 5000+100 = 5100 New mean =5100/100 = 51. read less

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V=32/3* r^3

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