**Probability**

*Probability*is the likelihood of something happening**in the future**. It is expressed as a number between zero (can never happen) to 1 (will always happen). It can be expressed as a fraction, a decimal, a percent, or as "odds".

Here is a table of typical probabilities:

To learn more about probability, see the probability notes.EVENT Probability ..as a fraction ..as a decimal ..as odds against The sun rises in the morning 1 1. 0. A flipped coins turns up 'heads' 1/2 .5 1:1 A card drawn out of a deck is a club 1/4 .25 3:1 A card drawn out of a deck is a spade,heart, or diamond 3/4 .75 1:3 A kid flies by flapping her arms 0 0. infinite