(9) अलग-अलग फाइलों में से (6) फाइलें चुनने के कितने तरीके हैं?
How many ways are there to choose (6) files from (9) different files?
Explanation opens after your attempt
D. (84)
Concept
\(\binom{9}{6}=\binom{9}{3}=84\). Complementary selection makes calculation easier.
Why this answer is correct
The correct answer is D. (84). \(\binom{9}{6}=\binom{9}{3}=84\). Complementary selection makes calculation easier.
Exam Tip
\(\binom{9}{6}=\binom{9}{3}=84\) है। पूरक चयन से गणना आसान होती है।
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