The average of 45 numbers was found to be 39. Later on, it was detected that a number 65 was misread as 56. Find the correct average of the given numbers.
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e. 39.2.
Given that
The average of 45 numbers was found to be 39
it was detected that the number 65 was misread as 56
Now,
The total value of 45 numbers = 45 × 39 = 1755
The currect total of 45 numbers = 1755 - 56 + 65 = 1764
Hence, the correct average = 1764/45 = 39.2