// TODO:

double average = 0;

double allAvg = 0;

for(int i = 0; i<scores.length;i++) {

for(int j=0; j<scores[i].length;j++) {

// 一个学生平均分

average = average + (scores[i][j]+0.0)/scores[i].length;

}

allAvg = allAvg + average/scores.length;

System.out.printf("第%d个学生平均分：%.6f\n",i+1,average);

average = 0;

}System.out.printf("所有学生平均分：%.6f\n",allAvg);