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Media aritmetica a trei numere este 60,24.Aflați numerele daca media aritmetica a primelor doua este 51,21 iar a ultimelor doua 67,2.Va rog mult

Răspuns :

a+b+c/3=60,24
a+b/2=51,21
b+c/2=67,2

a+b+c=60,24*3
          =180,72
a+b=51,21*2
      =102,42
b+c=2*67,2
      =134,4
Cat e a ?
180,72-134,4=46,32
Cat e b?
120,42-46,32=74,1
Cat e c ?
134,4-74,1=60,3
V;60,3+74,1+46,32=180,72
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