volumeofsphere matlab function need help

I put 10^4 into the function and I should be expecting Number of points inside sphere to be 3 and the area should be 0.0024. Am I missing something if so what do I need to change ?

function volumeofsphere3(n)
  ds = RandStream.getGlobalStream;
  reset(ds);
  x=2*rand(n,1);
  y=rand(n,1);
  z=rand(n,1);
  count=0
  for i=1:n
    r=sqrt((x(i)-1/3)^2+(y(i)-1/3)^2+(z(i)-1/2)^2);
    if r<=0.04
      count=count+1;
    end
  end
  fprintf(1,'Number of points inside sphere: %d\n', count)
  Area_of_Sphere=8*(count/n)
end