Wednesday, June 17, 2009

Probability

Hi, I'm back after a two week school break. Only managed to teach probability for my 4 SA class on Monday coz I've to be in Ipoh for the rest of the week for a course on the new Smart School Management System. The Probability topic for Form 4 is a very short and simple topic

The study of probability helps us figure out the likelihood of something happening. For instance, when you roll a pair of dice, you might ask how likely you are to roll a seven. In math, we call the "something happening" an "event.

Definitions :

The sample space is a set consisting of all the possible outcomes of an event (like drawing a marble from a jar, or picking a card from a deck). The number of different ways you can choose something from the sample space is the total number of possible outcomes.

Because each probability is a fraction of the sample space, the sum of the probabilities of all the possible outcomes equals one.

An experiment is a situation involving chance or probability that leads to results called outcomes.

An outcome is the result of a single trial of an experiment.

An event is one or more outcomes of an experiment.

Probability is the measure of how likely an event is.