C. 30 / 30
ExplanationStep 1: Use nPr = n!/(n-r)!. Step 2: 6P2 = 6×5 = 30. Step 3: Use permutation when order is important in arrangements.
Step 1: nPr = n!/(n-r)! formula लगाएं। Step 2: 6P2 = 6×5 = 30। Step 3: Arrangement में order important हो तो permutation लगाएं।
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