Question:
The mean of 30 values was 150. It was detected on rechecking that one value 165 was wrongly copied as 135 for the computation of the mean. Find the correct mean.
The mean of 30 values was 150. It was detected on rechecking that one value 165 was wrongly copied as 135 for the computation of the mean. Find the correct mean.
Updated On: Oct 4, 2024
- 151
- 149
- 152
- None of these
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The Correct Option is A
Solution and Explanation
The mean of 30 values = 150
After replacing 135 by 165,
The correct mean will be = \(\frac{30 \times 150 + (-135 + 165)}{30}\)
= \(150 + \frac{30}{30} = 151\)
The correct mean will be 151
The correct option is (A): 151
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