C. 36
ExplanationStep 1: nCr is used for selection. Step 2: 9C2 = 9×8/(2×1)=36. Step 3: In selection order is not important.
Step 1: nCr selection के लिए use होता है। Step 2: 9C2 = 9×8/(2×1)=36। Step 3: Selection में order important नहीं होता।
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