Compound Events
Tap to Set
A compound event is two or more things happening. Set the coin and spinner to match the target!
Target: {{ s1.targetCoinStr }} AND
{{ s1.targetColorStr }}
{{ s1.currentCoin === 0 ? 'H' : 'T' }}
Coin
+
Match!
Drag to Build
Build a tree diagram to show all outcomes of flipping a coin twice.
Tokens
H
T
Start
H
T
{{ node.current || '?' }}
HH
HT
TH
TT
Tap to Select
The grid shows the sample space (all outcomes) of rolling two 4-sided dice and adding them.
Find all outcomes where the sum is {{ s3.targetSum }}
DIE 1
DIE 2
{{cell.r}}+{{cell.c}}
{{ cell.sum }}
Selected: {{ s3.selectedCount }} / {{ s3.targetCount }}
Adjust to Calculate
For independent events, multiply their probabilities:
What is the probability of flipping Heads on a coin AND spinning Red on a {{ s4.spinnerSections }}-color spinner?
P(Heads)
{{ s4.n1 }}
{{ s4.d1 }}
×
P(Red)
{{ s4.n2 }}
{{ s4.d2 }}
=
Total P
{{ s4.n3 }}
{{ s4.d3 }}
🏆
You did it!
You've mastered compound events. You can list outcomes, make tree diagrams, and multiply probabilities!