A-A+
On July 1st the ratio of men to women in Club
问题详情
On July 1st the ratio of men to women in Club X was 9 to 20. During the month, 2 additional men and 2 additional women joined the club, and no members dropped out.
Column A Column B
The ratio of men to women in
Club X at the end of July 1/2
A．if the quantity in Column A is greater
B．if the quantity in Column B is greater
C．if the two quantity are equal
D．if the relationship cannot be determined from the information given请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：D
解析：7月1日X俱乐部的男女比例是9：20。这个月中又有2名男子和2名女士加入该俱乐部，且无会员退出。解：本题的正确答案为(D)。比较的左项是在7月底X俱乐部的男女比。考生在做此题时，最易犯的错误是把9：20当成是男女的人数，从而进行计算时得到(9+2)：(20+2)=1/2，认真思考，考生就能发现9：20是比例，而2是数字，两者不能相加。
