题目
In a group of adults, the ratio of women to men is 5 to 6, while the ratio of left-handed people to righthanded people is 7 to 9. Everyone is either left- or right-handed; no one is both.
Quantity A
The number of women in the group
Quantity B
The number of left-handed people in the group
选项
C.The two quantities are equal.
D.The relationship cannot be determined from the information given.
解析
我们假设有 \(x\) 个人。
由于总人数按女性和男性 **5:6** 的比例分配,我们可知女性人数为 \( \frac{5}{11}x \)。
同理,如果总人数 \(x\) 按**左撇子**和**右撇子**的比例划分,我们可知左撇子人数为 \( \frac{7}{16}x \)。
因为 \(x\) 是正数,所以 \( \frac{5}{11} > \frac{7}{16} \)。