Arithmetic mean of 6 values is 4. If number 5 is found as incorrect value in series and replaced with correct number as 17, then what will be the mean of new data series?
Correct answer: B
Explanation
The original sum is 6 x 4 = 24. Swapping the wrong value 5 for the correct 17 changes the sum by +12, giving 36. The new mean is 36 / 6 = 6.