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The average of 18 observations is recorded as 124. Later it was found that two observations with values 64 and 28 were entered wrongly as 46 and 82. Find the correct average of the 18 observations.
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111 7 9 - 122
- 123
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137 3 9
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Correct Option: B
As per the given details in question ,
Difference in observations = 64 + 28 – 46 – 82 = – 36
| ∴ Correct average = 124 - | = 122 | |
| 18 |
