Introduction to Probability Worksheets
Free printable introduction to probability worksheets with step-by-step answer keys. Every worksheet is uniquely generated so students never see the same problems twice. Topics covered range from single-event probability (coin, spinner, small bag) at the easy level through to two-event probability (two dice sums, complement, at-least) at the advanced level.
CCSS.7.SPLK20.10
Difficulty Levels
Beginner
- Concepts
- Single-event probability (coin, spinner, small bag)
- Number Range
- 2–4 outcomes, whole-number counts
- Steps
- 2–3 steps
- Example
- P(heads) on a coin flip?
Easy
- Concepts
- Single-event probability (dice, larger bags, spinners)
- Number Range
- 5–12 outcomes, simple fractions
- Steps
- 2–3 steps
- Example
- Bag has 3 red, 4 blue, 2 green. P(blue)?
Medium
- Concepts
- Conditional/complementary probability
- Number Range
- 6–26 outcomes, filtered events
- Steps
- 3–4 steps
- Example
- P(even number) on a die? P(not red) from a bag?
Hard
- Concepts
- Two-event probability (two dice sums, complement, at-least)
- Number Range
- 36 outcome pairs or complement reasoning
- Steps
- 3–5 steps
- Example
- Two dice rolled. P(sum = 7)?
Grade Availability
Introduction to Probability worksheets are available for Grades 7–10. Problems are automatically adjusted to match grade-level expectations in number range, complexity, and notation.
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