In this lesson, you will learn about the especially important concept of “number of cases” in using data. Rather than simply memorizing words, you will aim to explain the mechanisms and reasons in your own words.
Key Point
When a tree diagram branches step by step according to the choices, it prevents omissions and overlaps when counting.
When a tree diagram branches step by step according to the choices, it prevents omissions and overlaps when counting.
Important Points
- Check the reasons, not only the conclusion
- Distinguish similar terms and exceptions
- Try to see whether the same way of thinking can be used with other examples
Practice
- Explain the key point in two sentences.
- Give one common misconception and explain what is different about it.
- Check it by applying it to a familiar or specific example.