海翔GMAT数学课程(陈文彬).doc

此讲义为海翔陈文彬老师的视频课程讲义
具体课程地址:
Q1:
A certain roller coaster has 3 cars, and a passenger is equally likely to ride in any 1 of the 3 cars each time that passenger rides the roller coaster. If a certain passenger is to ride the roller coaster 3 times, what is the probability that the passenger will ride in each of the 3 cars?
0
1/9
2/9
1/3
1
Answer: -------------------------------------------------------------------------------------------------------
Q2:
In 1997 there were 300 female employees pany C. If the number of female employees pany C increased by 60 percent from 1977 to 1987, by what percent did the number of female employees pany C increase from 1987 to 1997?
(1) From 1977 to 1997 the number of female employees increased by 200 percent pany C.
(2) In 1977 there were 100 female employees pany C.

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.
Answer:
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Q3:
A gardener is going to plant 2 red rosebushes and 2 white rosebushes. If the gardener is to select each of the bushes at random, one at a time, and plant them in a row, what is the probability that the 2 rosebushes in the middle of the row will be the red rosebushes?
1/12
1/6
1/5
1/3
1/2
Answer: -------------------------------------------------------------------------------------------------------
Q4:
If 1050 – 74 is written as an integer in base 10 notation, what is the sum of the digits in that integer?
424
433
440
449
467
Answer:
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Q5:
If w and c are integers, is