The mean of 100 observations was calculated as 40. It was founder later on that one of the observation was misread as 83 instead of 53. The correct mean is :
A. 39
B. 39.7
C. 40.3
D. 42.7
Answer: Option B
Solution(By Examveda Team)
Difference = 53 - 83 = - 30Change in average
= $$\frac{- 30}{100}$$
= - 0.3
So, correct average
= 40 - 0.3
= 39.7
Related Questions on Average
A. 125 km/hr
B. 75 km/hr
C. 135 km/hr
D. 120 km/hr
Join The Discussion