The mean and standard deviation of \(10\) observations are \(20\) and \(8\) respectively. Later on, it was observed that…
Q1
The mean and standard deviation of \(10\) observations are \(20\) and \(8\) respectively. Later on, it was observed that one observation was recorded as \(50\) instead of \(40\) .Then the correct variance is:
[JEE Main 2023, 15 Apr (Shift 1)]
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