Question
The mean of 10 observations is 8. One more observation
is added, and the new mean becomes 9. What is the value of the 11th observation?Solution
The mean of 10 observations=18 Total =10×8=80 After including the new observations =10+1=11 New mean =11 Then total=11×9=99 13th observations =99-80 =19.
Read the given statement and answer the question that follows.Â
Cause: Trees are being cut to build huge houses.Â
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