MCQ
${ }^{47} C_4+\sum_{r=1}^5{ }^{52-r} C_3$ बराबर हैं:
- A${ }^{51} \mathrm{C}_4$
- ✓${ }^{52} \mathrm{C}_4$
- C${ }^{53} \mathrm{C}_4$
- Dइनमें से कोई नहीं
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