To figure out probabilities from a graph or chart, like a probability tree or table, you can follow these simple steps:

1. Look at the Outcomes: Start by noticing all the possible outcomes. In a probability tree, each branch shows a different result.

2. Find the Probabilities: Give each branch its chance of happening. For example, when flipping a coin, the chance of getting heads ($P(H)$) or tails ($P(T)$) is both $0.5$.

3. Combine the Probabilities: To find the chances of events happening together, you multiply the probabilities along the branches. For example, if you flip the coin twice, then $P(HH) = 0.5 \times 0.5 = 0.25$.

4. Add Up the Probabilities: If you want to know the total chance of exclusive outcomes (which can’t happen at the same time), just add their probabilities. For example, for getting heads or tails, you would do $P(H \text{ or } T) = P(H) + P(T)$.

This method helps you see and calculate probabilities easily!