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Statistics question

2010 · Shift 0 · Q27
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Statistics question

2010 · Shift 0 · Q27

JEE MainMathematicsStatisticsMCQ+4 / −1
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
  1. A
    52{5 \over 2}25​
  2. B
    112{11 \over 2}211​
  3. C
    6
  4. D
    132{13 \over 2}213​
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