1. Please write the non-shortcut formula for

2. Please write the formula for a permutation taken r at a time.

3. Please write the formula for the sample z-score.

4. Please write the formula for the sample mean.

5. Please write the formula for the weighted mean.

6. Please write the formula for the grouped mean

7. Please write the formula for the population variance shortcut form.

8. Please write the formula for the counting rule.

9. Please write the formula for the multiplication rule for independent events.

10. Please write the addition formula for events that are not mutually exclusive.