weighted average

例句：

1. 1. The weighted average of the scores is 85 out of 100.
   成绩的加权平均值是85分。
2. 2.To calculate the weighted average, we need to multiply each score by its weight and then sum them all up.
   要计算加权平均值，我们需要将每个分数乘以其权重并全部加起来。
3. 3.The weighted average of the profits is 15% higher than the previous year.
   利润的加权平均值比去年高15%。