### Home > ACC6 > Chapter 5 Unit 12 > Lesson CC2: 5.2.2 > Problem5-39

5-39.

If you used a random number generator for the numbers from $1$ through $20$ to play a game, what is the theoretical probability of getting each of these outcomes?

1. A multiple of $3$ or a multiple of $7$, P(multiple of $3$ or multiple of $7$

How many possible favorable outcomes are there?

How many total outcomes are there?

2. P(even or odd)

Follow the steps in part (a).

$1$

3. P(prime or $1$

There are $9$ possible correct outcomes.

4. How did you find the probabilities of these events? Be ready to share your ideas with the class.

What method did you use to find the probabilities?