MCQ
${ }^{61} C_{57}-{ }^{60} C_{56}$ का मान है।
- A${ }^{61} \mathrm{C}_{58}$
- ✓${ }^{60} \mathrm{C}_{57}$
- C${ }^{60} \mathrm{C}_{58}$
- D${ }^{60} \mathrm{C}_{56}$
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