Probability worksheets
Probability worksheets give students in Grade 11 to Grade 12 focused practice in probability. This page has 2 free printable sets, grouped by grade, and every set includes a computed answer key that is never wrong. Print them or save as a PDF, no login needed.
What's inside
- On any day a bus is late independently with probability 0.3. Consider 7 days. Find the probability that at most 2 are late, rounded to 4 decimal places.
- On any day a bus is late independently with probability 0.9. Consider 9 days. Find the probability that exactly 8 are late, rounded to 4 decimal places.
- A factory makes light globes; each is faulty independently with probability 0.7. A box holds 5 globes. Find the probability that all 5 are faulty, rounded to 4 decimal places.
- A multiple-choice quiz has 6 questions; a student guesses each with probability 0.4 of being correct. Find the probability that at least one is correct, rounded to 4 decimal places.
- A basketball player takes 4 independent free throws and makes each with probability 0.5. Find the probability that all 4 are made, rounded to 4 decimal places.
- A factory makes light globes; each is faulty independently with probability 0.3. A box holds 8 globes. Find the probability that at least one is faulty, rounded to 4 decimal places.
Sample questions. Each set (A, B, C…) has fresh numbers and a computed answer key.
Grade 11 Probability
Grade 12 Probability
Frequently asked questions
Are these probability worksheets free?
Yes. Every worksheet on ChalkBee is free to view and print or save as a PDF, with no login required. Pro unlocks the printable answer key and removes the watermark.
Do the worksheets have answer keys?
The answers are computed in code from the exact questions on each sheet. The printable answer key is available with Pro.
What grades do probability worksheets cover?
Probability worksheets on this page cover Grade 11 to Grade 12. There are 2 printable sets in total, grouped by grade so you can pick the right level.
How do I print or download them?
Open any set, then use your browser's print option to print it or to save it as a PDF. The pages are laid out to print cleanly on standard letter or A4 paper.