code: public class PermutationTest {
      private static final int[] data = new int[]{
          85, 88, 75, 66, 25, 29, 83, 39, 97,
          68, 41, 10, 49, 16, 65, 32, 92, 28, 98
      };
  
      private static int pick(int at, int remain, int accu, int treat) {
          if (remain == 0) return (accu > treat) ? 1 : 0;
          return pick(at - 1, remain - 1, accu + data[at - 1], treat)
              + ((at > remain) ? pick(at - 1, remain, accu, treat) : 0);
      }
  
      public static void main(String[] args) {
          int treat = 0;
          double total = 1.0;
          for (int i = 0; i <= 8; ++i) {
              treat += data[i];
          }
          for (int i = 19; i >= 11; --i) {
              total *= i;
          }
          for (int i = 9; i >= 1; --i) {
              total /= i;
          }
          int gt = pick(19, 9, 0, treat);
          int le = (int) (total - gt);
          System.out.printf("<= : %f%%  %d\n", 100.0 * le / total, le);
          System.out.printf(" > : %f%%  %d\n", 100.0 * gt / total, gt);
      }
  }
  