Compound Probability

Flipping one coin is easy: 1/2. But what's the chance of flipping heads AND rolling a 6? Or the chance of rolling a 6 OR drawing a heart? The moment you combine events, 'favorable over total' gets fuzzy — you can't just count faces anymore. You need rules for stitching single probabilities into compound ones. Two words carry the whole system: AND, and OR. Each has its own operation, and mixing them up is the most common probability mistake there is.