Question 604441
total score = (85 + 75 + 90)*2 + (96 + 88 + 60 + 76) + 85*2*2 
total score = 250*2 + 320 + 340 = 500 + 320 + 340 = 1160


average = 1160/(3*2 + 4 + 1*2*2) = 1160/(6 + 4 + 4) = 1160/14 = 82.8571 = 83


so, Sara's average score is 83