-
The average of 100 items was found to be 30. If at the time of calculation, two items were wrongly taken as 32 and 12 instead of 23 and 11, then the correct average is :
-
- 29.8
- 29
- 29.9
- 29.5
- 29.8
Correct Option: C
Given that , The average of 100 items = 30
If at the time of calculation, two items were wrongly taken as 32 and 12 instead of 23 and 11 , then
Correct sum of 100 items = 30 × 100 – 32 – 12 + 23 + 11
Correct sum of 100 items = 3000 – 44 + 34 = 2990
∴ Required average = 2990 ÷ 100 = 29.9
