Question

calculati media aritmetica a trei nr stiind ca doua au media aritmetica :11, 36 si 32

Answer 1

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
  /  2c = 114
c = 114 : 2
c = 57
a = 64 - 57
a = 7
b = 22 - 7
b = 15