program gupiao;
var
  a:array[1..1000] of real;
  i,j,n,money,s,t:longint;
  max:real;
begin
  assign (input,'stock.in');
  reset (input);
  assign (output,'stock.out');
  rewrite (output);
  readln (n);
  for i:=1 to n do
    read (a[i]);
  readln;
  readln (money);
  max:=0;
  for i:=1 to n-1 do
    for j:=i+1 to n do
    begin
      t:=t+1;
      if (money/a[i])*(a[j]-a[i])>=max then
        max:=(money/a[i])*(a[j]-a[i]);
      if a[j]-a[i]>0 then
        s:=s+1
    end;
  writeln (max:0:3);
  writeln (s/t:0:3);
  close (input);
  close (output)
end.