# Probability Tricks | Summary and Q&A

32.2K views
December 12, 2019
by
tecmath
Probability Tricks

## TL;DR

Learn probability shortcuts to solve complex questions with ease.

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### Q: How can combinations be used to solve probability questions?

Combinations are used to determine the number of different ways we can select objects from a larger group. They involve calculating factorials and can help simplify probability calculations.

### Q: What is the difference between "and" and "or" in probability questions?

In probability questions, "and" indicates multiplication, while "or" indicates addition. When calculating probabilities, we multiply the probabilities of each event for "and" scenarios and add the probabilities for "or" scenarios.

### Q: How can probability shortcuts be used to solve complex questions?

Probability shortcuts involve using combinations and simplifying calculations. By understanding the formulas for combinations and applying them correctly, we can solve complex probability questions more efficiently.

### Q: Can you provide an example of a complex probability question?

Sure. For a bag with 8 balls containing 5 yellow and 3 blue balls, what is the probability of choosing either 3 yellow and 1 blue ball or 2 yellow and 2 blue balls? The answer involves calculating combinations and adding the probabilities of each scenario.

## Summary & Key Takeaways

• The video introduces probability shortcuts to solve complex probability questions quickly.

• Basic combinations are explained, showcasing how to select objects from a larger group.

• The video provides examples and step-by-step solutions to probability questions involving different scenarios.