Respuesta :

6! means 6x5x4x3x2x1    . . . . .4! means 4x3x2x1

A.    6 x 5 x 4! / 4! x 2!
       =  30 / 2
       =15

B.    4 x 3!/ 2! 3!
       = 4 / 2
       = 2

C.  i'm not sure what the dots means, is i assume its a minus
      ( 24 + 6) (6 - 2)
      30 x 4          =  120

D.  120 - 24    = 96


So, the order will be B - A - D - C

hope this helps