Question

va inplor primul care imi raspunde dau coroana e unrgent plsss
vreu raspuns concret

Answer 1

H-elevii care practica numai handbal

V-elevii care practica numai volei

C-elevii care practica ambele sporturi

H+V+C=25

H+C=17

V+C=14

adunand ultimele doua relatii:H+V+C+C=31⇔25+C=31⇔C=31-25⇔C=6 ambele sporturi

H=17-6=11 numai handbal

V=14-6=8 numai volei

Verificare: 11+8+6=25 elevi