\binom{30}{2} = \frac{30 \cdot 29}{2} = 435,\quad \binom{90}{3} = \frac{90 \cdot 89 \cdot 88}{6} = 117480,\quad \binom{120}{5} = \frac{120 \cdot 119 \cdot 118 \cdot 117 \cdot 116}{120} = 190578024

Tue, 05 May 2026 16:57:15 +0000

Content under review