Question 432128
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Hi
25 students in Ms sally class 
Let x and (25-x) represent th enumber of girls and boys respectively
Question states***
 {{{2/3 = (25-x)/x}}}  |Cross Multiplying 
  2x = 3(25-x)
   5x = 75
    x = 15, number of girsls.  There are 10 boys

CHECKING our Answer***
   10/15 = 2/3