1. Learning Intention Long-Run Relative Frequency
Success Criteria
Calculate probabilities from Long-run experiments and results

2. Do Now – Recapping Theoretical probabilities
When a die is tossed what is the probability that the result is even?
A spinner is divided into 5 equal sectors numbered 1 to 5. What is P(3)? P(number greater than 1)?
A bag contains 6 blue marbles, 3 white and 4 green marbles. What is the probability of choosing at random:
A blue marble?
A blue or green marble?

3. Long-run Relative Frequency
Not equally likely outcomes
Repeat the situation a large number of times under the same circumstances.
P(event) = number of times event happens
number of trials
E.g. Describe how you would
determine the probability that a
coin when tossed onto a square
grid like this one will land completely
inside a square (not on a line).
You would draw up the grid and carry out the
experiment (at least 30 times).
Draw up a tally table and complete it.