Brainlag PlusTwo or more events with tree diagrams, independence, picks with and without replacement, and at least one.
Along and between
On a tree diagram, each pair of branches adds up to 1.
To find the probability of a path, multiply along it. If several paths give what you want, add their probabilities.
- P(head) = 0.6 on each of two throws
- P(two heads) = 0.6 × 0.6 = 0.36
- P(exactly one head) = 0.6 × 0.4 + 0.4 × 0.6 = 0.48
The rest of this lesson and its 8 practice questions are in Plus.
Screen 1 of 4, free to read.
- 8 exam-style questions, marked as you go, each with a worked solution
- Anything you get wrong is saved to your flashcards