Question

Calculați media aritmetica a trei număr stiind ca doua cate doua au media aritmetica : 11 , 36 , 32

Answer 1

(a+b):2=11/×2
a+b=22

(a+c):2=36/×2
a+c= 72

(b+c):2=32/×2
b+c=64

2a+2b+2c=22+72+64
2a+2b+2c=  158 /:2
a+b+c = 79
(a+b+c):3=79
a+b+c =79:3
a+b+c=26(3)
Sper ca te-am ajutat!!!