The mean of 8 observations is 27.If one observation is included, the mean is 26.Find the included observation?
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Mean of 8 observations = x +x+x+x+x+x+x+x/8 = 27
If one observation is added = 8x+x / 9 = 26
9x = 26 × 9
9x = 234
× = 234/ 9
x = 26
If one observation is added = 8x+x / 9 = 26
9x = 26 × 9
9x = 234
× = 234/ 9
x = 26
shruthika67:
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