Statistics and Probability: JEE Main 2010 Mathematics question

JEE Main 2010 · Annual, Paper 1 · Q5427

JEE Main 2010Annual, Paper 1MathematicsMediumStatistics and Probability258× since 2002

For two data sets, each of size 5, the variances are given to be 4 and 5 and the corresponding means are given to be 2 and 4, respectively. The variance of the combined data set is

Statistics and Probability: JEE Main 2010 Mathematics question

JEE Main 2010 · Annual, Paper 1 · Q5427

JEE Main 2010Annual, Paper 1MathematicsMediumStatistics and Probability258× since 2002

For two data sets, each of size 5, the variances are given to be 4 and 5 and the corresponding means are given to be 2 and 4, respectively. The variance of the combined data set is

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