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JEE Main 2003 Mathematics question

MathematicsStatisticsJEE Main 2003

In an experiment with 15 observations on , the following results were available: , One observation that was 20 was found to be wrong and was replaced by the correct value 30 . The corrected variance is

Answer: (2)

Solution

Corrected and . Mean . Variance ,

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Question ID VK-038244