Compound events: find the number of outcomes
key notes:
The branches of a tree diagram represent all possible outcomes.
Learn with an example
📢 You spin the spinner and flip a coin. How many outcomes are possible?
Make a tree diagram, then count the branches.
The first event has 4 outcomes: J, K, L and M.
The second event has 2 outcomes: heads (H) and tails (T).
Make a tree diagram:
Count the number of branches. There are 8 branches, so there are 8 possible outcomes.
📢 You pick a marble and flip a coin. How many outcomes are possible?
Make a tree diagram, then count the branches.
The first event has 4 outcomes: purple (Pu), orange (O), green (G) and blue (Bl).
The second event has 2 outcomes: heads (H) and tails (T).
Make a tree diagram:
Count the number of branches. There are 8 branches, so there are 8 possible outcomes.
📢 You pick a marble and pick a card. How many outcomes are possible?
Make a tree diagram, then count the branches.
The first event has 4 outcomes: blue (Bl), orange (O), green (G) and purple (Pu).
The second event has 5 outcomes: 1, 2, 3, 4 and 5.
Make a tree diagram:
Count the number of branches. There are 20 branches, so there are 20 possible outcomes.
let’s practice!
