CUET Preparation Today
The mean of 20 observations was 85, but later it was found that 97 was misread as 79. The correct mean is: |
85.8 85.7 85.6 85.9 |
85.9 |
Here, \(\frac{Sum}{20}\) = 85, ⇒ Sum = 1700. According to the question, 97 was misread as 79 Therefore, 97 - 79 = 18 will be added to the sum ⇒ New Sum = 1700 + 18 = 1718 ⇒ \(\frac{1718}{20}\) = 85.9 |
