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COMEDK2014MathematicsStatistics

Coefficient of variation of two distributions are 60 and 70 , and their standard deviation are 21 and 16 respectively. What are their arithmetic means?

Options

  1. A35,20
  2. B35,22.85
  3. C30,22.85
  4. D30,20

Correct answer

B. 35,22.85

Step-by-step solution

Coefficient of variation = x 100 For first distribution, 60= 21 x 100 x = 21 100 60 =35 For second distribution, 70= 16 x 100 x = 16 100 70 =2285 Hence, required means are 35,22.85 .

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