The mean of 8 observations is 40. If 5 is added to each observation, then what will be the new mean
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mean= sum of terms/no of terms
mean=40
no of terms=8
therefore sum of terms=40x8= 320
increasing each term by 5,
8x5=40
new sum of terms= 320+40 = 360 terms
new mean= 360/8 = 45
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