B. 210 / 210
ExplanationStep 1: nPr is used for ordered arrangements. Step 2: 7P3 = 7×6×5 = 210. Step 3: Use permutation when order is important.
Step 1: nPr ordered arrangements के लिए use होता है। Step 2: 7P3 = 7×6×5 = 210। Step 3: Order important हो तो permutation लगाएं।
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