Răspunsuri

  • Utilizator Brainly
2014-07-25T03:33:47+03:00
Ma=(a+b+c)/3=600
a+b+c=3x600
a+b+c=1800

(a+b)/2=220
a+b=220x2
a+b=440

440+c=1800
c=1800-440
c=1360

a=1/5 din 1360
a=1360:5
a=272

272+b=440
b=440-272
b=168


Mersi mult pentru raspuns! Ma poti ajuta te rog si la cea cu media ponderata? Am mare nevoie. Mersi anticipat!
  • Utilizator Brainly
2014-07-25T09:16:17+03:00


( a+b+c):3=600

a+b+c=600·3

a+b+c=1800


(a+b):2=220

a+b=220·2

a+b=440


440+c=1800

c=1800-440

c=1360


a=1/5 din 1360

a=1360:5

a=272


272+b=440

b=440-272

b=168

Verificare: a+b+c=?

                  272+168+1360=1800