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    Please can someone explain this to me!
    3 A simple graph is one in which any two vertices are directly connected by at most one arc and no
    vertex is directly connected to itself.
    A connected graph is one in which every vertex is connected, directly or indirectly, to every other
    vertex.
    A simply connected graph is one that is both simple and connected.
    (i) A simply connected graph is drawn with 6 vertices and 9 arcs.
    (a) What is the sum of the orders of the vertices? [1]
    (b) Explain why if the graph has two vertices of order 5 it cannot have any vertices of order 1.
    [2]
    (c) Explain why the graph cannot have three vertices of order 5. [2]
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    (Original post by benitashrestha)
    Please can someone explain this to me!
    3 A simple graph is one in which any two vertices are directly connected by at most one arc and no
    vertex is directly connected to itself.
    A connected graph is one in which every vertex is connected, directly or indirectly, to every other
    vertex.
    A simply connected graph is one that is both simple and connected.
    (i) A simply connected graph is drawn with 6 vertices and 9 arcs.
    (a) What is the sum of the orders of the vertices? [1]
    (b) Explain why if the graph has two vertices of order 5 it cannot have any vertices of order 1.
    [2]
    (c) Explain why the graph cannot have three vertices of order 5. [2]
    Could you specify which question you need an explanation for?
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    (Original post by .raiden.)
    Could you specify which question you need an explanation for?
    All if possible please!
 
 
 
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