Question 932398
x = score on final



Assume that 0.80 is the lowest threshold for a B or B-



0.744*0.75 + 0.25x = 0.80



0.558 + 0.25x = 0.80



0.25x = 0.80-0.558



0.25x = 0.242



x = 0.242/0.25



x = 0.968



So you need to get a final exam score of 96.8% or better to get an overall grade of 80% or better.