Question

Media aritmetica a trei numere este 58. Media aritmetica a primelor doua numere este51, iar ultimelor doua numere este 63. Care sunt numerele?

Answer 1

ma=a+b+c/3=58=>a+b+c=174(58+58+58)
ma=a+b/2=51 =>a+b=102(51+51)
ma=b+c/2=63=>b+c=126(63+63)
a+b+c=174=>a+126=174=>a=174-126=>a=48
a+b+c=174=>102+c=174=>c=174-102=>c=72
48+b+72=174=>b=174-120=>b=54

Answer 2

a + b + c = 58 * 3
a + b + c = 174
a + b = 51 * 2
a + b = 102
b + c = 63 * 2
b + c = 126
102 + c = 174
c = 174 - 102
c = 72
b = 126 - 72
b = 54
a = 174 - 54 - 72
a = 48