C. 720 / 720
ExplanationStep 1: In factorial multiply the number down to 1. Step 2: 6! = 6×5×4×3×2×1 = 720. Step 3: Remembering small factorials makes calculations faster.
Step 1: Factorial में number से 1 तक multiplication होता है। Step 2: 6! = 6×5×4×3×2×1 = 720। Step 3: Small factorials को याद रखना calculation तेज करता है।
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