First find what fraction of the balls are not white. (1/4) + (1/8) + (1/12) = 22/48 Therefore the 26 balls are 1 - (22/48) = 26/48 of the total. Let the total number of balls be n. [tex]n\times\frac{26}{48}=26[/tex] Therefore n = 48. The number of blue balls is 48/8 = 6 balls.