C. 10 / 10
ExplanationStep 1: Factorial relation is 10! = 10×9!. Step 2: 10!/9! = 10. Step 3: Factorial cancellation makes calculation easier.
Step 1: Factorial relation 10! = 10×9! होता है। Step 2: 10!/9! = 10 है। Step 3: Factorial cancellation से calculation आसान होती है।
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