【求助】求问两道数学题~~~谢谢！

琦琦子 · 发表于 2012-7-22 15:48:10

25号上午北京场就要考试了~~~请教大家两道数学题！关于排列组合还有韦恩图的部分真是很让我头疼啊！！！
麻烦大家啦！！！

跪谢！~~

Q18:
On a certain transatlantic crossing, 20 percent of a ship’s passengers held round-trip tickets and also took their cars abroad the ship.If 60 percent of the passengers with round-trip tickets did not take their cars abroad the ship, what percent of the ship’s passengers held round-trip tickets?

A.33 1/3%
B.40%
C.50%
D.60%
E.66 2/3%
Q22:
A construction company was paid a total of $500,000 for a construction project.The company’s only costs for the project were for labor and materials.Was the company’s profit for the project greater than $150,000?
(1)The company’s total cost was three times its cost for materials.
(2)The company’s profit was greater than its cost for labor.

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE is sufficient.

答案是：C C

琦琦子 · 发表于 2012-7-22 16:12:49

第一题我做出来啦！~~~~

	Cars abroad	Non Cars abroad	Total
Round-trip ticket	20%=(1-60%)A	60%*A	A
Single-trip ticket
Total

所以 A=20%/40%=50%

【求助】求问两道数学题~~~谢谢！

所属分类: GMAT考试

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