Averages · Question 12 · Hard
Averages question 12
The average of 25 numbers was found to be 36. Later it was discovered that the number 64 had been wrongly read as 46. What is the correct average?
- 36.72
- 36.18
- 35.28
- 37.2
Answer and explanation
Answer: A. 36.72
Explanation: The total was understated by 64 − 46 = 18. Correct average = 36 + 18/25 = 36 + 0.72 = 36.72.
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