It is given that the average of 19 numbers is 8.5. If one number with value 63 was entered incorrectly as 25,then the corrected average is:
Answer & explanation
Correct answer: option 4
Difference due to incorrect entry = 63 - 25 = 38
Increment in average due to wrong entry = \(\frac{38}{19}\) = 2
So , Correct average = 8.5 + 2 = 10.5