Probability & Statistics
T
Compound Probability
Push a bit harder. Apply what you know to less familiar problems.
Mathematics · Medium
5
questions · ~4 min · 3 hints each (−5 pts)
Confidence tracking, 3-tier hints and instant feedback.
What you'll learn
- 1P(A and B) = P(A)×P(B) if independent.
- 2P(A or B) = P(A)+P(B) if mutually exclusive.
- 3Frequency trees help.
- 4Expected = P × trials.
Question mix
- Multiple choice×3
- Fill the gap×2
How it works
Score ≥ 80% to unlock- 1
Rate your confidence
Tell us how sure you feel before answering. It powers your weak-topic map.
- 2
Use hints if stuck
Reveal up to 3 progressive hints per question. Each hint costs 5 Treasure Points.
- 3
See what went wrong
Instant feedback solves the exact question you just answered, so nothing stays fuzzy.
Ready when you are. This takes about 4 minutes.