mean of 20 observations is 17. if in the observation 40 is replaced by 12,find the new mean
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4
Answer:
15.6
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woonnaamith:
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Given,
Mean of 20 observations is 17
Sum of the observations = x
Mean = sum of observations/number of observations
17 = x/20
x = 17 × 20
x = 340
Subtract 40 from the total sum and add 12.
= (340 - 40 ) + 12
= 300 + 12
= 312
New Mean = 312 / 20
= 15.6
Therefore, the new mean is 15.6
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