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问一个数学题, prep的。。
in a certain senior class, 72% of the male and 80% of the female applied to college, what fraction of the students in senior class are male?
1. there are 840 students in senior class
2. 75% of the students in senior class have applied to college.
答案是B, 请问为什么呀
我对于这种百分比的题目最搞不清楚了
转得头昏。。
还有一周就考了,请大家帮帮忙!! |
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