Summary
Probability is the chance or likelihood of an event happening, expressed as a fraction, decimal, or percentage. It ranges from 0 (impossible event) to 1 (certain event).
Exam Tips
Key Definitions to Remember
- Probability: The likelihood of an event occurring, expressed as a fraction, decimal, or percentage.
- Relative Frequency: The number of times an event occurs divided by the total number of trials.
- Independent Events: Events that do not affect each other's outcomes.
- Mutually Exclusive Events: Events that cannot happen at the same time.
Common Confusions
- Confusing mutually exclusive events with independent events.
- Misunderstanding that probabilities must always sum to 1.
Typical Exam Questions
- What is the probability of obtaining a head when tossing a coin? Answer: 0.5
- If a die is rolled, what is the probability of getting a number greater than 3? Answer: 0.5
- What is the probability of drawing a red card from a standard deck of cards? Answer: 0.5
What Examiners Usually Test
- Ability to calculate probability using fractions, decimals, and percentages.
- Understanding of independent and mutually exclusive events.
- Application of probability in real-life scenarios.