It is equivalent I believe...hope this helps!
Yes 2/4 is less than 2/3 :) I hope this helps
There would be 1,320 different ways, just multiply all the possible front runners 12 second runners 11 and third runners 10, 12x11x10=1,320
A) 45%, (100-200)/200=0.45 which also equals 45% :)