If you throw a die for two times, what is the probability that you will get a one on the first throw or a one on the second throw (or both)?
- P(1) on first roll and P(anything on second roll) = 1/6 * 1 = 1/6
- P(anything on first roll) and P(1) on second roll = 1 * 1/6 = 1/6
- Add those together: 1/6 + 1/6 = 2/6 = 1/3