Topic 4

Question 1

The language of chance

Answer 1

• No chance
  
  • Probably
  • Definitely
  • Even chance
  • Impossible
  • Unlikely
  • Certain
  • Possibly
    Maybe

Question 2

Sample space:

Answer 2

The list of all the possible outcomes. We put the sample space in {braces}.

e.g. Tossing a coin: heads, tails - sample space can be written as {H, T}.

Question 3

P(E)

Answer 3

‘the Probability of an Event’. To calculate this, we divide the number of favourable outcomes by the total number of outcomes.

Question 4

Equally Likely Outcomes

Answer 4

when there is no obvious reason why one outcome should occur more often than another.

Question 5

A deck of cards

Answer 5

• 52 total
  
  • 4 suits (clubs, spades, diamonds, hearts)
  • 2 colours (black, red)
  • 13 cards in each suit
• Picture cards are Jack, Queen and King

Question 6

Complementary events

Answer 6

If there is an event, E, the complement is when we don’t include E. We write the complement as E with a dash on top

Question 7

Relative Frequency

Answer 7

The relative frequency of an event is the frequency of it, divided by the total number of frequencies - write our answers using fractions, decimals and percentages.

Question 8

SIMULATIONS

Answer 8

A simulation represents an experiment or situation

Question 9

Expected Frequency

Answer 9

the number of times the event SHOULD occur
- the probability of an event is p, the number of times the event is repeated is n, then our expected frequency is n×p.

Question 10

NxP

Answer 10

expected frequency formula. p= the probability of an event, n= the number of times the event is repeated.

Question 11

IMPORTANT RULE OF PROBABILITY

Answer 11

Always simplify your fractions!