The average age of 30 students is 15 years. It was observed that while calculating the average age, the age of a student was taken as 15 years instead of 9 years. What will be the correct average age?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 14.8 years.
Incorrect total age = 30 × 15 = 450 years
Difference in the age recorded = 15 - 9 = 6 years
Correct total age = 450 - 6 = 444 years
Average age = 444/30 = 14.8 years