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请高手帮忙解答以下几道题目哈，谢谢！ Q14.A total of 30 percent of the geese includedin a certain migration study were male. If some of the geese migrated during the study and 20 percent of the migrating geese were male, what was the ratio of the migration rate for the male geese to the migration rate for the female geese? [Migration rate for geese of a certain sex= (number of geese of that sex migrating) / (total number of geese of that sex)] A. 1/ 4 B. 7/12 C. 2/3 D. 7/8 E. 8/7
Q18.A rectangular region has a fence alongthree sides and a wall along the fourth side. The fenced side opposite the wall is twice the length ofeach of the other two fenced sides. If the area of the rectangular region is 128 square feet, what is the total length of the fence, in feet? A. 4 B. 8 C. 16 D. 32 E. 64 Q19:At a certain company, 25 percent of the employees are male and 50 percent of the employees are sales staff. What is the number of employees at this company? (1) Exactly 7 of the employees at the company are males who are sales staff.
(2)There are 16 more female employees than male employees at the company
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.
E. Statements (1) and (2) TOGETHER are NOT sufficient.
Q26:K is a set of integers such that if the integer r is in K, then r + 1 is also in K. Is 100 in K?
(1)50 is in K.
(2)150 is in K
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.
E. Statements (1) and (2) TOGETHER are NOT sufficient.
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发表于 2008-8-21 22:44:00
