jee-main 2019 Q73

jee-main · India · session2_09apr_shift1 Measures of Location and Spread

If the standard deviation of the numbers $- 1,0,1 , k$ is $\sqrt { 5 }$ where $k > 0$, then $k$ is equal to
(1) $\sqrt { 6 }$
(2) $4 \sqrt { \frac { 5 } { 3 } }$
(3) $2 \sqrt { \frac { 10 } { 3 } }$
(4) $2 \sqrt { 6 }$

If the standard deviation of the numbers $- 1,0,1 , k$ is $\sqrt { 5 }$ where $k > 0$, then $k$ is equal to\\
(1) $\sqrt { 6 }$\\
(2) $4 \sqrt { \frac { 5 } { 3 } }$\\
(3) $2 \sqrt { \frac { 10 } { 3 } }$\\
(4) $2 \sqrt { 6 }$

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