Idea 2of 22Builds onOutcomes and events
Equal sections are equally likely
Does every outcome on a spinner have the same chance?
Today you'll discover
- when outcomes have the same chance
- what a bigger section does
- how marbles in a bag work
Think firstBlue, orange and green: three outcomes
Are blue, orange and green equally likely on this spinner?
Decide first, then press Next. Compare how much of the circle each colour covers.
A spinner that is half blue, a quarter orange and a quarter green. Then a spinner of four equal sections in four colours, numbered 1 to 4 around the rim. Back on the first spinner, a dashed line splits blue's half into two quarters: 4 equal parts. The last step shows a jar of 3 orange marbles and 1 blue.
See the whole ideathe big idea and the key word, in one place
The big idea
Outcomes are equally likely when each one has the same chance, like equal sections of a spinner.
Compare themEqual sections: every colour has the same chance. Unequal sections: the colour with more of the circle is more likely.
MarblesIn a bag, each marble is equally likely. The colours are equally likely only when they have the same number of marbles.
Key word
- equally likely
- having the same chance of happening
Ready to use it?
- Say whether the outcomes of a spinner are equally likely.
- Find the more likely colour in a bag of marbles.