jee-main 2019 Q74

jee-main · India · session2_08apr_shift2 Measures of Location and Spread

A student scores the following marks in five tests: $45,54,41,57,43$. His score is not known for the sixth test. If the mean score is 48 in the six tests, then the standard deviation of the marks in six tests is:
(1) $\frac { 10 } { 3 }$
(2) $\frac { 100 } { 3 }$
(3) $\frac { 10 } { \sqrt { 3 } }$
(4) $\frac { 100 } { \sqrt { 3 } }$

A student scores the following marks in five tests: $45,54,41,57,43$. His score is not known for the sixth test. If the mean score is 48 in the six tests, then the standard deviation of the marks in six tests is:\\
(1) $\frac { 10 } { 3 }$\\
(2) $\frac { 100 } { 3 }$\\
(3) $\frac { 10 } { \sqrt { 3 } }$\\
(4) $\frac { 100 } { \sqrt { 3 } }$

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