\( \frac{11!}{9!\cdot2!} \) का मान ज्ञात कीजिए।
Find the value of \( \frac{11!}{9!\cdot2!} \).
Explanation opens after your attempt
B. (55)
Concept
\(11!=11\cdot10\cdot9!\) and (2!=2), so the value is (55). Expand first and then cancel.
Why this answer is correct
The correct answer is B. (55). \(11!=11\cdot10\cdot9!\) and (2!=2), so the value is (55). Expand first and then cancel.
Exam Tip
\(11!=11\cdot10\cdot9!\) और (2!=2), इसलिए मान (55) है। पहले विस्तार करके फिर कटौती करें।
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