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The average of 25 observations is 13. It was later found that an observation 73 was wrongly entered as 48. The new average is
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- 12.6
- 14
- 15
- 13.8
- 12.6
Correct Option: B
On the basis of given details in question , we have
Difference of two observations = 73 – 48 = 25
| ∴ New average = 13 + | = 14 | |
| 25 |
Second method to solve this question with the help of given formula :
Here, n = 25, m = 13 , a = 73, b = 48
| Correct Average = m + | |
| n |
| Correct Average = 13 + | |
| 25 |
Correct Average = 13 + 1 = 14
