Worked Example
Mistake correction 6
For Class 11 Mathematics, explain or solve a combinations question from the chapter "Permutations and Combinations". Focus on mistake correction and show the working clearly.
Step-by-step solution path
- Read the topic idea: Combinations.
- Recall the core explanation from the chapter: Mathematics syllabus chapter for Class 11.
- Use the related formula "ⁿCr = n!/r!(n-r)!" as the main tool while solving.
- Write the reasoning in simple school-level language before the final answer.
Final learning answer
This example is centred on Combinations. A strong solution should identify the correct data, apply ⁿCr = n!/r!(n-r)!, and explain each transition instead of jumping directly to the answer.
Related formula
ⁿCr = n!/r!(n-r)!
ⁿCr = n!/r!(n-r)!