A data consists of 20 observations x₁,x₂,,x₂₀. If Σ i=1 ²⁰(x i +5)²=2500 and Σ i=1 ²⁰(x i -5)²=100, then the ratio of mean to standard deviation of this data is:

Statistics and Probability: JEE Main 2026 Mathematics question

JEE Main 2026 · 6 Apr, Morning shift · Q9

JEE Main 20266 Apr, Morning shiftMathematicsEasyStatistics and Probability258× since 2002

A data consists of 20 observations

x_1,x_2,\ldots,x_{20}

. If

\sum_{i=1}^{20}(x_i+5)^2=2500

and

\sum_{i=1}^{20}(x_i-5)^2=100

, then the ratio of mean to standard deviation of this data is:

JEE Main 2026 · 6 Apr, Morning shift · Q9

JEE Main 20266 Apr, Morning shiftMathematicsEasyStatistics and Probability258× since 2002

A data consists of 20 observations

x_1,x_2,\ldots,x_{20}

. If

\sum_{i=1}^{20}(x_i+5)^2=2500

and

\sum_{i=1}^{20}(x_i-5)^2=100

, then the ratio of mean to standard deviation of this data is: