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We still consider an Erdos-Renyi graph. A triangle in the graph consists of a triple of edges {i, j}, {j, k}, {k, i } with

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We still consider an Erdos-Renyi graph. A triangle in the graph consists of a triple of edges {i, j}, {j, k}, {k, i } with if k f i. (a) Find the expected number of triangles in the graph. (b) Extra credit: Find an expression for the variance of the number of triangles in the graph

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