Data Sufficiency

Please explain [double click to see the image]

aditi_bc wrote:Please explain [double click to see the image]

1) 56 % paid by 1, 2, 3, 4 > X insuf
2) X= 4.8 - insuf no info about others

1+2) top 6 paid 67.8

1,2,3,4 paid 56 so 13.8 paid between 5 and 6

13.8 / 2 = 6.9 if it is paid equally by 5 and 6 and compared to 4.8 by X ...so we don't know whether X was one of these two companies.

1,2, 3, 4, 6.9 , 6.9 , 4.8 .....NO

1,2,3,4, 4.8, 9, .....YES

INSUF, E