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Yr 8 Probability

TermDefinition
Probability The chance of an event occurring
Impossible Zero chance of an event occurring
Certain 100% chance of an event occurring
Event Is a result that an outcome may occur
Outcomes Is a particular result of a trial
Experiment Are performed to provide data, which then can be used to forecast outcomes in the future
Favourable outcome Is the outcome that we are looking for
Relative Frequency Is the experimental probability of it occurring
Theoretical Probability is written as... P(event)
The formula for theoretical probability is written as P(event)= number of favourable outcomes/number of possible outcomes
Sample space is.. Is the set of all the possible outcomes
Sample space is written as... S={ }
Complementary Events A and A' are complementary events When there is nothing in common between these events and together they form a sample space. (eg:- Head & Tails are complementary events
The formula for Complementary events can be written as P(A) + P(A')=1 or P(A')=1 - P(A) or P(A)=1 - (A')
Highly Unlikely- in percentage & decimal form. 0.1 10%
Very Unlikely- in percentage & decimal form. 0.2 20%
Unlikely- in percentage & decimal form. 0.3 30%
Less than even chance- in percentage & decimal form. 0.4 40%
Even chance- in percentage & decimal form. 0.5 50%
Better than even chance- in percentage & decimal form. 0.6 60%
Likely- in percentage & decimal form. 0.7 70%
Very Likely- in percentage & decimal form. 0.8 80%
Highly Likely- in percentage & decimal form. 0.9 90%
Experimental Probability formula is written as Number of times the event occurs/Total number of trials
There are ???? cards in a deck 52 cards
Suits in a deck of cards Clubs, Spades, Hearts & Diamonds
Created by: Tania L Kremers
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