Question

Ajutor va rog. *pentru 20 caractere*

Answer 1

Ma1=(x1+x2+....+x25)/25
7.25=(x1+x2+....+x25)/25
x1+x2+...+x25=7.25*25
x1+x2+...+x25=181.25

Ma2=(x1+x2+...+x10)/10
6.8=(x1+x2+...+x10)/10
x1+x2+...+x10=6.8*10
x1+x2+...+x10=68

x11+x12+...+x25=(x1+x2+...+x25)-(x1+x2+...+x10)=181.25-68=113.25
Ma3=(x11+x12+...+x25)/15=113.25/15=7.55