Question

Trei numere au suma 80. Media aritmetica a primelor doua este 12,iar media aritmetica a ultimelor 2 este 36 . Aflati cele 3 numere.

Answer 1

a+b+c=80
a+b/2=12 => a+b=24

24+c=80
c=56

b+c/2=36 => b+c=72
a+72=80
a=8

8+b+56=80
b=80-56-8
b=16

Answer 2

a+b+c=80
a+b/2=12->a+b=12*2=24
b+c/2=36->b+c=72
a+72=80
a=8
c+24=80
c=56
b=16