Discrete probability distributions

Detailed description

Four discrete distributions. Probabilities represented by vertical lines

1. Pr(X = x), lines drawn from axis to (1, 0.1), (2, 0.1), (3, 0.1), (4, 0.2), (8, 0.1), (9, 0.2), (10, 0.2).
2. lines drawn from axis to (1, 0.1), (2, 0.3), (3, 0.1), (10, 0.5).
3. lines drawn from axis to (5, 0.2), (6, 0.6), (7, 0.2).
4. lines drawn from axis to (2, 0.1), (4, 0.2), (6, 0.3), (8, 0.4).