JEE Main 201910 Jan, Evening shiftMathematicsEasyStatistics and Probability258× since 2002
If mean and standard deviation of 5 observations x₁, x₂, x₃, x₄, x₅ are 10 and 3, respectively, then the variance of 6 observations x₁, x₂, ….., x₅ and –50 is equal to