As a FRACTION, or RATIO.
The ratio used is: Number of Items I Want
Total Number of Items
~For example, let's look at an experiment. These ocean animals are swimming beneath you; and you want to find the probability of seeing a fish.
1st step: Find the NUMBER OF ITEMS YOU WANT for your outcome. (Amount of fish)
This is the top number of your fraction.(2)
2nd step: Find the TOTAL NUMBER OF ITEMS. (Amount of ALL animals)
This is the bottom of your fractions.(6)
3rd step: Write as fraction.......................................2
6
4th step: Make sure your fraction is reduced...............2 divided by 2=1
6 divided by 2=3
You found that 1 out 3 times you will see a fish in this group of animals!
Great job!
~Check out this PearsonSuccess Website to get more information about how to write probability as a fraction, or ratio!
~This Math Goodies Link gives you lots of examples, plus definitions of words we have used such as probability, event, outcome, and experiment. There are also several ways to practice what you have learned with various activities.
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