Probability: Difference between revisions
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Probability is the likelihood or measure of a specific event taking place, <ref>(Webster’s Revised Unabridged Dictionary. G & C Merriam, 1913)</ref><br>Usually represented as a percentage, probability is always a number smaller that 0, where a value of 1 represents definite certainty of a even, meanwhile 0 represents an impossible event. <br>Probabilities of multiple numbers of events all happening at once can be worked out given 2 criteria; | Probability is the likelihood or measure of a specific event taking place, <ref>(Webster’s Revised Unabridged Dictionary. G &amp; C Merriam, 1913)</ref><br>Usually represented as a percentage, probability is always a number smaller that 0, where a value of 1 represents definite certainty of a even, meanwhile 0 represents an impossible event. <br>Probabilities of multiple numbers of events all happening at once can be worked out given 2 criteria; | ||
1) You have the probability of each event taking place | 1) You have the probability of each event taking place | ||
2) The events are not mutually exclusive ( can happen at the same time) | 2) The events are not mutually exclusive ( can happen at the same time) | ||
<br>Probabilities of events that are non-mutually exclusive can be worked out through multiplying the probability of each individual event together. | <br>Probabilities of events that are non-mutually exclusive can be worked out through multiplying the probability of each individual event together. | ||
For example the probability of rolling two 6’s on a set of dice is 1/36. This Is worked out because the probability of rolling a 6 is 1/6 as there are 6 sides, and (1/6)*(1/6)=1/36. | For example the probability of rolling two 6’s on a set of dice is 1/36. This Is worked out because the probability of rolling a 6 is 1/6 as there are 6 sides, and (1/6)*(1/6)=1/36. | ||
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Revision as of 19:40, 28 November 2013
Probability is the likelihood or measure of a specific event taking place, [1]
Usually represented as a percentage, probability is always a number smaller that 0, where a value of 1 represents definite certainty of a even, meanwhile 0 represents an impossible event.
Probabilities of multiple numbers of events all happening at once can be worked out given 2 criteria;
1) You have the probability of each event taking place
2) The events are not mutually exclusive ( can happen at the same time)
Probabilities of events that are non-mutually exclusive can be worked out through multiplying the probability of each individual event together.
For example the probability of rolling two 6’s on a set of dice is 1/36. This Is worked out because the probability of rolling a 6 is 1/6 as there are 6 sides, and (1/6)*(1/6)=1/36.
- ↑ (Webster’s Revised Unabridged Dictionary. G & C Merriam, 1913)