Yes, NCERT Solutions for CBSE Class 9 include sample papers and previous year question papers. These papers are an essential part of the study material as they provide students with an understanding of the exam pattern, question types, and marking scheme. They help students to assess their knowledge and preparation level for the final exams. Here is a detailed explanation of the sample papers and previous year question papers included in NCERT Solutions for CBSE Class 9:

Sample Papers:
- Sample papers are designed based on the latest CBSE curriculum and syllabus.
- They consist of a set of questions covering all the topics and chapters prescribed in the CBSE Class 9 syllabus.
- Sample papers are created to simulate the actual exam environment and help students get familiar with the question paper pattern.
- They provide students an opportunity to practice and improve their problem-solving skills.
- Sample papers also help students to identify their weak areas and work on them before the final exams.

Previous Year Question Papers:
- Previous year question papers are the actual question papers that were asked in the CBSE Class 9 exams in the past years.
- They give students an idea about the type of questions that can be expected in the exams.
- By solving previous year question papers, students can understand the exam pattern, difficulty level, and the distribution of marks across different topics.
- It helps students to develop effective time management skills as they get accustomed to solving the papers within the given time limit.
- Solving previous year question papers also boosts students' confidence as they get a chance to evaluate their performance and assess their preparation level.

Importance of Sample Papers and Previous Year Question Papers:
- Sample papers and previous year question papers provide students with ample practice opportunities, enabling them to improve their problem-solving skills and gain confidence.
- They help students to understand the exam pattern, marking scheme, and the weightage of different topics.
- By solving these papers, students can identify their strengths and weaknesses, allowing them to focus on areas that require more attention.
- Sample papers and previous year question papers serve as a valuable resource for exam preparation, helping students to achieve better results in their CBSE Class 9 exams.

In conclusion, NCERT Solutions for CBSE Class 9 include sample papers and previous year question papers. These papers play a crucial role in helping students prepare effectively for their final exams by providing them with practice, familiarity with the exam pattern, and an understanding of the type of questions asked in the exams.