Probability & Problem Solving

Learn about probability, calculate chances of events, and solve probability problems.

8th Grade

Probability

~45 min

🎮 Interactive Activity: Probability Calculator

Calculate probability of events!

Favorable outcomes: 3
Total outcomes: 10

🎮 Interactive Activity: Compound Probability

Calculate probability of combined events!

P(A) = 0.5, P(B) = 0.5
Independent events

1. What is Probability?

📚 Probability Definition

Probability measures how likely an event is to occur. It ranges from 0 (impossible) to 1 (certain).

P(Event) = Favorable / Total

• 0 ≤ P ≤ 1

• P = 0: Impossible event

• P = 1: Certain event

2. Basic Probability

3. Compound Events

4. Complementary Events

5. Theoretical vs Experimental Probability

6. Real-World Applications

7. Worked Examples

8. Frequently Asked Questions

Practice Time!

Practice Quiz

Questions

Correct

Score

What is the probability of rolling a 3 on a standard die?

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If you flip a coin, what is P(heads)?

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A bag has 3 red and 5 blue marbles. What is P(red)?

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What is the probability of an impossible event?

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If P(A) = 0.3 and P(B) = 0.5, and events are independent, what is P(A and B)?

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What is the probability of drawing a heart from a standard deck?

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If you roll two dice, what is P(sum = 7)?

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What is the sum of probabilities of all possible outcomes?

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A spinner has 4 equal sections. What is P(not red) if 1 section is red?

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If P(A) = 0.6, what is P(not A)?

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