Basic Probability
1. Stating the problem: Let's explore some fundamental probability examples to understand basic concepts.
2. Example 1: Probability of drawing an ace from a standard deck of 52 cards.
There are 4 aces in the deck.
Probability = $\frac{\text{number of favorable outcomes}}{\text{total number of outcomes}} = \frac{4}{52} = \frac{1}{13}$.
3. Example 2: Probability of rolling an even number on a fair six-sided die.
Even numbers on a die are 2, 4, and 6, so 3 favorable outcomes.
Probability = $\frac{3}{6} = \frac{1}{2}$.
4. Example 3: Probability of flipping two coins and getting exactly one head.
Possible outcomes: HH, HT, TH, TT.
Favorable outcomes with exactly one head are HT and TH.
Probability = $\frac{2}{4} = \frac{1}{2}$.
5. Example 4: If a bag has 3 red and 2 blue balls, what's the probability of randomly picking a red ball?
Total balls = 3 + 2 = 5.
Probability of red = $\frac{3}{5}$.
These simple examples demonstrate key ideas of probability by calculating favorable outcomes over total outcomes.