标题: GMAT Pre Math (Please teach me !)ThX! [打印本页] 作者: maypoon 时间: 2009-2-1 22:39 标题: GMAT Pre Math (Please teach me !)ThX! Dear all,
Please teach me how to deal with the following questiones!Thank you so much !
Q1. A certain roller has 3 cars, and a passenger is equally likely to ride in any 1 of the 3 cars each times that passenger rides the roller coaster. If a certain passenger is to ride the roller coaster 3 times, what is the probability that passenger will ride in each of the cars?
A. 0 B. 1/9 C. 2/9 D. 1/3 E. 1 Ans : C
Q.2 There 're 8 books on a shelf, of which 2 are paperbacks and 6 are hardbacks. How many possible selections of 4 books from this self include at least 1 paperback?
A. 40 B. 45 C. 50 D. 55 E. 60 Ans. C
Q3. In a corporation, 50 percent of the male employees and 40 percent of the female employees are at least 35 years old . If 42 percent of all the employees are at least 35 years old, what fraction of the employees in the corporation are females?
A. 3/5 B. 2/3 C. 3/4 D. 4/5 E. 5/6 Ans. D
Q4. In town X, 64% of the population are employed , and 48% of the population are employed males. What % of the employed people in town X are females?
A. 16% B. 25% C. 32% D. 40% E. 52% Ans: B (Why the answer isn't C)
Q5. How many integers from 0 to 50 , inclusive , have a reminder of 1 when divided by 3?
A. 15 B. 16 C. 17 D. 18 E. 19 Ans: C (Why not B??)
