Simon、Marc 和 Wilson 参加了数学考试。Simon 和 Marc 的平均分是 85 分。Marc 和 Wilson 的平均分是 91 分。Simon 和 Wilson 的平均分是 82 分。

它不会直接告诉你答案，而是问你卡在哪一步看看 AI 是怎么陪你一步步弄懂这道题的

完整解法

1. Find the total score for each pair of boys

Total of Simon and Marc = $85 \times 2 = 170$
Total of Marc and Wilson = $91 \times 2 = 182$
Total of Simon and Wilson = $82 \times 2 = 164$

2. Find the total score of all three boys

Sum of the three totals = $170 + 182 + 164 = 516$
Since each boy is counted twice in this sum, the total score of the 3 boys is $516 \div 2 = 258$

3. Calculate the average score of the three boys

Average = $258 \div 3 = 86$

答案

$86$

1. Calculate the increase in the average score

Increase in average = $\frac{7.5}{3} = 2.5$

2. Calculate the new average score

New average = $86 + 2.5 = 88.5$

答案

$88.5$

AI 分析，可能出错

用 AI 批改，圈出写错的那一步，并自动将你的薄弱点存入错题本，形成你的错因库。