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  4. The arithmetic mean of 12 observations is 15 . If two observations 20 and 25 are removed then the arithmetic mean of remaining observations is

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Q. The arithmetic mean of 12 observations is 15 . If two observations 20 and 25 are removed then the arithmetic mean of remaining observations is

Statistics

Solution:

$AM =\frac{\text { Sum of all observation }}{\text { Total number of observations }}$.