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The image contains a graph showing the percentages of symptoms (fever, cough, and headache) caused by three different viruses, labeled A, B, and C. The solid lines represent Virus B, the dashed lines represent Virus A, and the dotted lines represent Virus C. Here's a breakdown of the graph and the corresponding dataThe image contains a graph showing the percentages of symptoms (fever, cough, and headache) caused by three different viruses, labeled A, B, and C. The solid lines represent Virus B, the dashed lines represent Virus A, and the dotted lines represent Virus C. Here's a breakdown of the graph and the corresponding 

- **Fever (發熱)**:
  - Virus A (dashed line): ~60%
  - Virus B (solid line): ~40%
  - Virus C (dotted line): ~50%

- **Cough (咳嗽)**:
  - Virus A: ~30%
  - Virus B: ~40%
  - Virus C: ~40%

- **Headache (頭痛)**:
  - Virus A: ~50%
  - Virus B: ~30%
  - Virus C: ~60%

The problem statement mentions a research study involving 200 patients infected with Virus A, 180 patients infected with Virus B, and 240 patients infected with Virus C. This data is essential for calculating the number of patients showing symptoms for each virus, based on the percentages from the graph.

Would you like a detailed calculation for each symptom based on the data? Let me know if you'd like specific details or have questions!

Here are 5 questions to expand on this:
1. What is the number of patients experiencing fever for each virus?
2. How many patients have a cough for each virus?
3. What percentage of patients have symptoms of both fever and headache for any virus?
4. How can we analyze these symptoms' distribution for different viruses?
5. How does this data help in understanding the virulence of the different viruses?

**Tip:** Always ensure that when interpreting graphs, you cross-check values carefully to avoid miscalculations.

Based on the query submitted by the user and the corresponding solution, generate the following information in JSON format:

This problem involves analyzing a graph that shows the percentages of symptoms caused by three viruses (A, B, and C) and calculating the number of patients experiencing fever, cough, and headache. It applies statistics, percentage calculations, and graph interpretation, suitable for students in Grades 9-12.

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