38, 69,22, 73, 31,47, 13, 82
61 which of the following numbers is greater than three-fourth of the numbers but less than one-fouth of the numbers in the list above?
(a) 56
(b) 68
(c) 69
(d)71
(e)73
答案是D
很郁闷这个题我就没明白,解释更糊涂了,请教能解释怎么做吗?
谢谢
还有一道 OG11绿
P71
74If Mel saved more than $10 by purchasing a sweater at a 15 percent discount, what is the smallestamount the original price of the sweater could be, to the nearest dollar?
A,45
B,67,
C,75
D,83
E,150
这道题也没不明白为什么答案是B
求助!!
38, 69,22, 73, 31,47, 13, 82
61 which of the following numbers is greater than three-fourth of the numbers but less than one-fouth of the numbers in the list above?
(a) 56
(b) 68
(c) 69
(d)71
(e)73
答案是D
很郁闷这个题我就没明白,解释更糊涂了,请教能解释怎么做吗?
谢谢
题目是问你,下面选项中的这些数字,哪个大于题干中的3/4的数字,而小于题干中1/4的数字。
题干里一共8个数字,你把它们从小大到排列好。大于其中3/4的数字,就是比前6个大;小于1/4的数字就是比后2个小。
也就是介于第6个数字(69)和第7个数字(73)之间,五个选项里只有71满足。
还有一道 OG11绿
P71
74If Mel saved more than $10 by purchasing a sweater at a 15 percent discount, what is the smallestamount the original price of the sweater could be, to the nearest dollar?
A,45
B,67,
C,75
D,83
E,150
这道题也没不明白为什么答案是B
求助!!
题目意思是,某人买了一件15%off的衣服(就是打八五折),省下的钱(被discounted掉的部分)大于10元。问你原价最小可能是多少,取到个位的近似值。
设原价是X,那么不等式就是X*15% >10,X>66.6666,所以X最小是67.
两道题都很简单,耐心把题目读懂就好了。
谢谢小萧笑!
明白了
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