A student scores 80, 90, and 85 on three tests. What score is needed on the 4th test for a 90 average?
✓ Correct Answer: Option C
Need: (80+90+85+x)/4 = 90 → 255+x = 360 → x = 105. Since 105 > 100, a perfect score isn't enough if max is 100.
Need: (80+90+85+x)/4 = 90 → 255+x = 360 → x = 105. Since 105 > 100, a perfect score isn't enough if max is 100.