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graph theory
adarsh shivhare
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Graph Theory
Dec 30, 2017
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A simple non directed graph contains 21 edges, 3 vertices of degree 4 and the other vertices are of degree 2. then the number of vertices in the graph is ?
adarsh shivhare
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Dec 30, 2017
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adarsh shivhare
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Ashwin Kulkarni
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Dec 30, 2017
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By handshaking,
sum of degree of vertices = 2*E, Let V be the total vertices
3*4 + (V-3)*2 = 2*21
(V-3)*2 = 30
V = 18
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