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MathsJEE Main 8 Apr 2026, Shift 2·Q7·MCQ·Easy–moderate

Statistics · Combined variance of two groups

A set of four observations has mean 1 and variance 13. Another set of six observations has mean 2 and variance 1. Then, the variance of all these 10 observations is equal to:
  1. (1)5.96
  2. (2)6.14
  3. (3)6.04
  4. (4)6.24

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