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KCET2013MathematicsApplication of Derivatives

In a regular graph of 15 vertices the sum of the degree of the vertices is 60 . Then, the degree of each vertex is

Options

  1. A5
  2. B3
  3. C4
  4. D2

Correct answer

C. 4

Step-by-step solution

Let degree of each vertex be K . Then, by condition, aligned & & 15 K &=60 & & K &=4 aligned So, the required degree of each vertex is 4 .

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