Question

Calculati media aritmetica a trei numere , stiind ca doua cate doua au media aritmetica : 11 , 36 si 32 .

Answer 1

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ma = (7+57+15)/3 = 79/3= 26.(3)

Answer 2

a + b = 2 *11
a + b = 22
a + c = 2 * 32
a + c = 64
b + c = 2 * 36
b + c = 72
a = 22 - b
22 - b + c = 64
- b + c = 42 si
b + c   = 72 le adunam
  /  2c = 114
c = 114 : 2
c = 57
a = 64 - 57
a = 7
b = 22 - 7
b = 15