Question

O grupa de studenti trebuie sa programeze 4 examene in timp de 8 zile . In cate moduri se pot face aceasta ?

Answer 1

C₈⁴ - combinari de 8 luate cate 4

C₈⁴=8!/(4!·4!)=8·7·6·5·4!/(4!·4!)=8·7·6·5/4·3·2=70