(14) कुर्सियों में से (7) कुर्सियां चुननी हैं और (5) खराब कुर्सियों में से कोई न चुनी जाए। कितने तरीके हैं?
From (14) chairs (7) chairs are to be selected and none of (5) broken chairs is selected. How many ways are there?
Explanation opens after your attempt
A. (36)
Concept
After removing (5) broken chairs (9) good chairs remain. The ways to choose (7) are \(\binom{9}{7}=36\).
Why this answer is correct
The correct answer is A. (36). After removing (5) broken chairs (9) good chairs remain. The ways to choose (7) are \(\binom{9}{7}=36\).
Exam Tip
(5) खराब कुर्सियां हटाने पर (9) अच्छी कुर्सियां बचती हैं। (7) चुनने के तरीके \(\binom{9}{7}=36\) हैं।
Login to save your score, XP, coins and progress.
