51.   The total number of possible combinations can be determined by multiplying the number of levels of each attribute.

52.   They held informal discussions about possible combinations over the past three years.

53.   They said Monsanto had also talked with several other companies about possible combinations.

54.   Weyerhaeuser said it had approached Willamette two years ago about a possible combination.

55.   Who stood before his closet each morning and picked out the worst possible combination by any standards, including those in the remote Australian outback?

56.   While car companies once offered buyers dozens of options and hundreds of possible combinations of color, trim and equipment, they now place a premium on standardization.

57.   With no clues about which way to proceed, one must blindly try out every possible combination, visiting each point on the terrain.

58.   Case said he first approached Levin about a possible combination in October.

59.   Due to the possible combination of these factors, last year she developed a condition called pnemothorax on the right side of her chest.

60.   Freeserve PLC, a pioneer in low cost Internet access in the United Kingdom, is negotiating a possible combination with France Telecom subsidiary Wanadoo SA.