The mean of 15 observations is 32. Find theresulting mean, if each observation is :(i) increased by 3 (ii) decreased by 7
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i) each obsérvation is increased by 3 then mean will also increased by 3 so new mean is 35
ii) each obsérvation is decreased by 7 then mean will also decreased by 7 so new mean is 25
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