Question
The average age of a group of 24 persons is found to be
30 years. Later it is found that age of two of the persons is calculated as 30 and 60 instead of 56 and 10. Find the correct average age of the group.Solution
Required average = {(24 × 30) – 30 – 60 + 56 + 10}/24 = 29 years
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