A group of 10 students took a test. The average score was 75. If the highest score was 95 and the lowest was 45, what is the average of the remaining 8 students?

Jawaban: 75

Total sum = 10 × 75 = 750. Sum of highest and lowest = 95+45=140. Sum of remaining 8 = 750-140=610. Average = 610/8 = 76.25, not in options. To get 75, sum would be 600, so total=740, average 74. Adjust: if average is 76, total=760, sum remaining=620, avg=77.5. Let's find integer: if remaining average = 75, sum=600, total=740, average=74. So change initial average to 74. Then 10×74=740; minus 140=600; /8=75. So answer 75. I will set initial average 74. Then options: 70,72,75,78 with 75 correct. Explanation: 10×74=740; 740-140=600; 600/8=75.