Probability

Probability

1. Probability scales

   • Probability
     • In maths, probability means how likely something is to happen
       • Probabilities are often shown on a scale with impossible at one end and certain at the other
   • Random
     • If a person is chosen at random it means every person has an equal chance of being chosen

2. How the theory works

   • Playing card example
     • A pack of playing cards has four suits
       • There are two red suits, diamonds and hearts
         • There are two black suits, clubs and spades
           • There is also two joker cards in every pack of cards
             • Each suit has 13 cards
               • Because each suit has 13 and there are 4 suits, it means that there are 52 suit cards and 2 jokers bringing the total to 54 cards

3. Experiments and games

4. When the theory doesn't help

   • Relative frequancy
     • Dean estimates the probability of throwing a six with his dice
       • He says that it is 35/100
         • This type of estimation is called relative frequency

5. Symbols used with probabilty

   • (P)
     • This means probabilty
   • \
     • This is used with fractions
   • '