Misc. Ex Q3 (i) | Class 11 Math NCERT | PNC | Committee with Exactly 3 Girls | Fastest Method
Автор: Your Classroom
Загружено: 2026-01-14
Просмотров: 6
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Welcome to YOUR CLASSROOM!
In this video, we solve Question 3 (Part i) from the Miscellaneous Exercise of Chapter 6 – Permutations and Combinations from NCERT Class 11 Maths, in just 2 minutes.
✏️ Solution Explanation (Fast Method)
• Number of girls = 4
• Number of boys = 9
Since the committee has exactly 3 girls, the remaining members must be 4 boys.
🔹 Selecting girls:
Using the property:
nCn−1=n
so, we used 4𝐶3= 4
Final Answer:
Total number of committees = 504
🎯 Why watch this video?
✔ Uses combination properties to simplify calculations
✔ Very fast and exam-oriented method
✔ Useful for Class 11 exams, JEE Mains, CET, and other engineering entrance exams
✔ Perfect for PNC lovers & Maths lovers
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