Question

Media aritmetica a numerelor naturale xsi y este 17.Media aritmetica a nr nat z si u este 39 .Aflati media aritmetica a nr nat x,y,z,u

Answer 1

Ma=(x+y)/2⇒17=(x+y)/2⇒x+y=17·2⇒x+y=34
39=(z+u)/2⇒z+u=39·2⇒z+u=78
Ma=(x+y+z+u)/4=(34+78)/4=112/4=28

Answer 2

[tex] \frac{x+y}{2}=17 [/tex]

x+y=17*2, x+y=34

$\frac{z+u}{2}=39$

z+u=39*2, z+u=78

x+y+z+u=78+34, x+y+z+u=112

$\frac{x+y+z+u}{4}= \frac{112}{4} =28$