Question

sa se determine nr de submultimi cu cate 3 elrmente ale unei multimi cu 6 elemente

Answer 1

Salut,

$C_6^3=\dfrac{6!}{3!\cdot (6-3)!}=\dfrac{6\cdot 5\cdot 4\cdot 3!}{3!\cdot 6}=20\;de\;submul\c{t}imi.$

Green eyes.