[ { "n": 5, "x_prob": 0.1, "invalid_prob": 0.2 }, { "n": 20, "x_prob": 0.3, "invalid_prob": 0.4 }, { "n": 3, "x_prob": 0.2, "invalid_prob": 0.3 }, { "n": 10, "x_prob": 0.25, "invalid_prob": 0.35 } ]