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在一本课外书上,我看到这样一道题:六年级两个班共有学生86人,六(1)班男女生人数的比是5:8,六(2)班男女生人数的比是7:4。两个班女生共有多少人?这道题中只告诉了两个班的总人数,没有告诉两个班各有多少人,根本就不能求出问题的答案。可是我反复读题后发现,根据“六(1)班男女生人数的比是5:8”这个条件,六(1)班的总人数一定是5+8=13的倍数。因为根据
In an extracurricular book, I saw the following question: There are 86 students in the sixth grade and two students in the sixth grade. The ratio of boys to girls in six (1) classes is 5: 8. The ratio of boys to girls in six (2) classes is 7: 4. What is the total number of girls in both classes? The total number of students in the two classes was only told in this question. The number of people in each of the two classes was not told and the answers to the questions could not be obtained at all. However, after reading the questions repeatedly, I found that the total number of six (1) classes must be a multiple of 5 + 8 = 13, based on the condition that "the ratio of boys to girls in six (1) classes is 5: 8. Because according to