Introduction to Probability
Probability helps us measure how likely something is to happen. It's like predicting the future with math!
What is Probability?
Probability (вероятность) is a measure of how likely an event is to happen.
- Expressed as a number from 0 to 1
- 0 means impossible — it will never happen
- 1 means certain — it will definitely happen
- Numbers in between show different chances
Think of it this way: Probability predicts the chance of different outcomes before they happen!
Random Events
Random events (случайные события) are outcomes that cannot be predicted with certainty.
🪙
Flipping a coin
🎲
Rolling a die
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Drawing a card
There's always an element of chance involved — we don't know what will happen until it happens!
Types of Events
Certain Event
(достоверное событие)
P = 1
Always happens
Example: The sun will rise tomorrow
Impossible Event
(невозможное событие)
P = 0
Never happens
Example: Rolling a 7 on a standard die
Random Event
(случайное событие)
0 < P < 1
May or may not happen
Example: Getting heads on a coin flip