1. Probability Probability measures the likelihood of an event occurring.
The range of probability of an event occurring ranges from 0 – 1.

2. Probability Spectrum Decimals 0 0.25 0.5 0.75 1 Percentages Fractions
Certain
Likely
Even Chance
Unlikely
Impossible
Decimals
Percentages
Fractions

3. Probability as a Fraction
Probability = Number of favourable outcomes
Number of possible outcomes
The probability of getting a head in a coin toss = 1 2
Number of favourable outcomes
Number of possible outcomes

4. Theoretical Probability
Theoretical probability looks at what would be the most likely outcome of an even.
For example:
If I toss a coin 10 times, theoretically I should get 5 heads and five tails.
If I roll a dice 6 time, theoretically I should get a 1, then a 2, then a 3, then a 4, then a 5, then a 6.

5. Experimental Probability
Experimental probability is the probability outcome that results from an experiment or you actually testing a probability idea.
For example:
If I toss a coin 10 time, the theoretical probability is that I will get 5 heads and 5 tails.
When trying this out, if I get 7 heads and 3 tails.
Despite the theoretical probability of 5 heads and five tails, my experimental probability differed with 7 heads and 3 tails.

6. Theoretical Probability vs Experimental Probability
Theoretical probability is the most likely outcome, while experimental probability is the actual outcome we achieve...