175,说总共1200人,32%有A,48%有B,30%又有A又有B,然后56%有C,问最多有多少人只有C没有A和B,好像是300零几,一下没反推出来(同59)
这个我怎么觉得是50%啊,32+48-30=50,因为C又是56%,所以只有C的部分就是50%.
这里就一个答案啊,干嘛要问最多有多少人呢?
请NN指点!
举报
184.There are 100 pounds of fruit and water in the fruit is 99% by weight. After the fruit are dried and some water evaperates, water in the fruit is 98% by weight. How does the water weigh after the fruit are dried.
这道题目是不是这样做的:水果重1磅,水分蒸发后水果的重量仍然不变,但是比例变了,水:水果=98:2,所以这时候水重98/2=49
141. 211. 数轴上从左到右三个点:u,t,v 问:if point t is to the right of the zero?
(1) line ut is to the left of the zero
(2) line tv is to the right of the zero
这道题目我根本就没看懂....
期待大家的讨论!!!
实在不好意思,上面的211题是我自己糊涂了....
就是选D.好简单...
只是我一直把(1)和(2)合起来看,发现矛盾...
哎.脑子有问题....
前面两题还是希望大家能给予帮助!!!
怎么都没人来回答呀。...
郁闷!!!
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