Click a region to add contents
Diagram settingsLabels, appearance & layout
Drag set symbols to move circles. Drag region contents to move text. Layout changes are constrained to keep all regions usable. Use the size controls to resize circles. Focus a set symbol and use arrow keys to move it with a keyboard.
Explore the regionsOrdinary & conditional probability
Click regions to select or deselect them. The probability statement describes all selected regions together.
“Given” restricts the possible outcomes to the condition. Only the part of the event inside that condition counts.
Event E Condition F E ∩ F Outside F