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If 17 arithmetic means are inserted between 7 2 and - 83 2 , then the 17 t h arithmetic mean is

Options

  1. A- 19
  2. B- 29
  3. C- 39
  4. D- 49

Correct answer

C. - 39

Step-by-step solution

Let d be the common difference. Then d = - 83 2 - 7 2 18 = - 5 2 So, the 17 t h mean is given by - 83 2 - - 5 2 = - 83 2 + 5 2 = - 78 2 = - 39

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