Question

a media arimetica de X e Y=20. se Z=40, qual a media aritmetica de X,Y e Z ?.

Answer 1

X + Y/2 = 20
X + Y = 40

Z = 40

(X + Y) + Z/3 = Media Artm.
40 + 40/3 = Media Artm.
80/3 = Media Artm