最后一题是个图表题,题目翻成中文大致是这样的: 在50个人的一次考试中,最多错1题的人有x个,最多错2题的人有y个,最多错3题的有z个,最多错4题的有i个,最多错5题的有j个,最多错6题的有k个,一个都没错的有l个,问刚刚好错3个有多少个。 因为是个图表,我没有看到at most (最多)这个修饰词,于是直接填了z。
x Number of People Who Made at Most x Errors
0 5
1 16
2 24
3 41
4 57
5 87
A typing test was given to 87 people. The table shows the cumulative frequency distribution for the numbers of errors made by this group of people on the test. How many of the 87 people made exactly 3 errors on the test?