Nabisco Holdings Corp. (NYSE: NA) and Nabisco Group Holdings Corp. (NYSE: NGH) today announced results for the third quarter ended September 30, 2000. Nabisco's reported net sales for the quarter increased nearly 10 percent to $2.25 billion from $2.06 billion in last year's third quarter. Worldwide sales from ongoing operations, excluding Nabisco's European businesses transferred during the quarter to the new United Biscuits investment venture, advanced 13 percent to $2.