(10) प्रश्नों में से (7) प्रश्न चुनने के कितने तरीके हैं?
How many ways are there to select (7) questions from (10) questions?
Explanation opens after your attempt
A. (120)
Concept
\(\binom{10}{7}=\binom{10}{3}=120\). Complementary selection makes calculation faster.
Why this answer is correct
The correct answer is A. (120). \(\binom{10}{7}=\binom{10}{3}=120\). Complementary selection makes calculation faster.
Exam Tip
\(\binom{10}{7}=\binom{10}{3}=120\) है। पूरक चयन से गणना जल्दी होती है।
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