Reason with probability
Count the possible outcomes and choose the exact answer.
Coins, dice sums and at least one
Eight questions. No time limit.
- Questions answered
- 0 / 8
- Active time
- 0:00
What can happen?
Read what is random and what is being counted. Choose the exact probability or expected point value.
Two fair dice: 36 equally likely ordered outcomes.
One way to solve it
- Correct answers
- 0 / 8
This sends this round — score, settings, active time and task counts — to Studio AM with a random guest ID, and keeps sharing later rounds until you turn it off. No name, no individual answers, no drawings, and nothing from your earlier history.
How to play
Choose one of four answers. The answer locks when selected. Read the method, then choose Next question.
Count equally likely outcomes, not just different-looking results. Two dice have 36 ordered outcomes, but their sums are not equally likely.
All answers are exact. Fractions may represent probabilities or point values. For draws without replacement, the bag changes after the first draw.
Expected payout is the average points received over many repetitions, not a promised result on one roll. Expected net gain subtracts the fixed cost and can be negative.
Finish all eight questions to save a result in this browser. An unfinished round is not saved. Active time includes answers and review, but not background tabs. There is no time limit or speed bonus.
Use Tab and Enter or Space to choose an answer. Keys 1–4 also select answers, except when another control is focused.
History stays in this browser. Community sharing is off until you choose. Guest settings
Give feedback
Optional and off by default. Share starts, completions, replays and error categories with our team. No answers, drawings or names.
How this data is used