1. **Problem statement:** A box contains 6 white, 7 red, and 9 black balls. What is the probability of drawing a ball that is either red or white? 2. **Formula and rules:** Probability of an event $E$ is given by $$P(E) = \frac{\text{Number of favorable outcomes}}{\text{Total number of outcomes}}$$ 3. **Calculate total balls:** $$6 + 7 + 9 = 22$$ 4. **Calculate favorable outcomes:** Favorable outcomes are balls that are red or white: $$6 + 7 = 13$$ 5. **Calculate probability:** $$P(\text{red or white}) = \frac{13}{22}$$ 6. **Interpretation:** The probability of drawing a red or white ball from the box is $\frac{13}{22}$, which means if you randomly pick one ball, there is a 13 out of 22 chance it will be red or white. **Final answer:** $$\boxed{\frac{13}{22}}$$