Q1
What is the probability formula?
AFavourable outcomes ÷ total outcomes
BTotal outcomes ÷ favourable outcomes
CFavourable + total outcomes
DFavourable - total outcomes
ICSEClass 10 (ICSE)MathematicsCh 25 · Topic 2
Practice and Revision - Probability
Let us practise and revise what we learned about probability. Probability quantifies the likelihood of events, extending to combined events,
Core concept
The probability of an event is calculated as favourable outcomes divided by total possible outcomes, ranging from 0 (impossible) to 1 (certain).
How it works
For combined events using 'and', we often multiply probabilities (for independent events), while 'or' events often involve addition.
Why it matters
A sample space lists all possible outcomes of an experiment, essential for correctly calculating probabilities.
Key detail
Understanding probability helps us make informed decisions and predictions in various real-life situations, from games to risk assessment.
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Quick notes
• Probability = favourable outcomes ÷ total outcomes.
• Range: 0 (impossible) to 1 (certain).
• 'And' events (independent): multiply probabilities.
• 'Or' events: often involve addition.
• Sample space lists all possible outcomes.
• This is essential for correct probability calculation.
• Probability aids informed decisions and predictions.
• Applications: games, risk assessment, more.