The maan of 5 observation is 60. Later on observation was deleted from the set and the mean calculated.If the deleted number is 100. What is the new mean?
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Explanation:
first calculate sum of all observations
Mean = x/n
60= x/5
x=5×60
x = 300
one observation is deleted and one observation sum is 100
so new sum of 4 observation is
= 300-100
= 200
Mean = 200/4
mean = 50
New mean is 50
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