Question
The average age of a group of 15 persons is found
to be 30 years. Later it is found that age of two of the persons is calculated as 35 and 52 instead of 60 and 12. Find the correct average age of the group.Solution
Required average = {(15 × 30) – 35 – 52 + 60 + 12}/15 = 29 years
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