Probability

Let S = {E₁, E₂, ........., E₈} be a sample space of a random experiment such that \(P({E_n}) = {n \over {36}}\) for every n = 1, 2, ........, 8. Then the number of elements in the set \(\left\{ {A \subseteq S:P(A) \ge {4 \over 5}} \right\}\) is ___________.