C. 11 / 11
ExplanationStep 1: Factorial relation is 11! = 11×10!. Step 2: 11!/10! = 11. Step 3: Factorial cancellation makes calculation faster.
Step 1: Factorial relation 11! = 11×10! होता है। Step 2: 11!/10! = 11 है। Step 3: Factorial cancellation से calculation तेज होती है।
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