-
The average of 20 numbers is calculated as 35. It is discovered later on that while calculating the average, one number, namely 85, was mis read as 45. The correct average is :
-
- 36
- 36.5
- 37
- 37.5
- 36
Correct Option: C
Here , The average of 20 numbers = 35
Sum of 20 numbers = 20 × 35
According to question ,
Correct sum of 20 numbers = 20 × 35 – 45 + 85
Correct sum of 20 numbers = 700 + 40 = 740
| ∴ Required average = | = 37 | |
| 20 |
