400-600-1123
本题由2提供
视频解析
资深讲师题题有解析
文字解析
Algebra Simu
1.Given that a + b = 8, it follows from (a + b) + c = 12 that 8 + c = 12, or c = 4. However, the value of b still cannot be determined. For example, if a = 6, b = 2, and c = 4, then a + b + c = 12 and a + b = 8. On the other hand, if a = 4, b = 4, and c = 4, then a + b + c = 12 and a + b = 8; NOT sufficient.
2.Given that b + c = 6, it follows from a + (b + c) = 12 that a + 6 = 12, or a =6. However, the value of b still cannot be determined. For example, if a = 6, b = 3, and c = 3, then a + b + c = 12 and b + c = 6. On the other hand, if a = 6, b = 2, and c = 4, then a + b + c = 12 and b + c = 6; NOT sufficient.
Taking (1) and (2) together, it follows from (1) that c = 4 and it follows from (2) that a = 6. Substituting these values in a + b + c = 12 gives 6 + b + 4 = 12, or b = 2.
The correct answer is C;
both statements together are sufficient.
GMAT会员
- 【OG18-P680-668题】In a review of 2,000 studies of human behavior that date back to the 1940s, two Swiss psychologists, declaring that since most of the studies had failed to control for such variables as social class and family size, none could be taken seriously.
- 【OG18-P680-671题】Manufacturers rate batteries in watt-hours; if they rate the watt-hour higher, the longer the battery can be expected to last.
- 【OG18-P680-672题】At the end of the 1930s, Duke Ellington was looking for a composer to assist him-someone not only who could arrange music for his successful big band, but mirroring his eccentric writing style as well in order to finish the many pieces he had started but never completed.
- The passage provides information to support which of the following statement about La Nina?
- The author of the passage would most likely agree with which of the following statements about the link between increased solar activity and certain seasonal weather changes on the Earth?
添加官方小助手微信
了解更多GMAT考试与咨询
12G备考资料