Probability

Calculate simple and compound probabilities, and understand experimental vs theoretical probability.

7th Grade

Probability

~45 min

🎮 Interactive Activity: Probability Calculator

Calculate probability from favorable and total outcomes!

3 favorable out of 10 total

🎮 Interactive Activity: Compound Probability

Calculate probability of combined events!

P(A) = 0.5, P(B) = 0.5
P(A and B) = ?

1. Understanding Probability

What is Probability?

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

Basic Formula:

P(event) = number of favorable outcomes ÷ total number of outcomes

Example: Rolling a die

What's the probability of rolling a 3?

Favorable outcomes: 1 (rolling 3)

Total outcomes: 6 (1, 2, 3, 4, 5, 6)

P(3) = 1/6

2. Theoretical Probability

3. Experimental Probability

4. Compound Probability

5. Problem-Solving Strategies

6. Real-World Applications

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

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What is the probability of flipping heads on a coin?

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If P(A) = 0.4 and P(B) = 0.3, what is P(A and B) if independent?

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What is the probability of NOT rolling a 6 on a die?

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A spinner has 8 equal sections. What's P(landing on any one section)?

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If you flip a coin twice, what's P(both heads)?

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What is experimental probability?

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A deck has 52 cards. What's P(drawing a heart)?

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If P(rain) = 0.3, what's P(no rain)?

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