GMAT数学讲义

2022-06-05 03:59:00

  

  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?

  A. 0 B. 1/9 C. 2/9 D. 1/3 E. 1

  Q2:

  In 1997 there were 300 female employees at Company C. If the number of female

  employees at Company C increased by 60 percent from 1977 to 1987, by what percent did the number of female employees at Company C increase from 1987 to 1997?

  (1) From 1977 to 1997 the number of female employees increased by 200 percent at

  Company C.

  (2) In 1977 there were 100 female employees at Company 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.

  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?

  A. 1/12 B. 1/6 C. 1/5 D. 1/3 E. 1/2

  Q4:

  If 1050 – 74 is written as an integer in base 10 notation, what is the sum of the digits in that integer?

  A. 424 B. 433 C. 440 D. 449 E. 467

  Q5:

  If w and c are integers, is w > 0?

  (1) w + c > 50 (2) c > 48

  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.

  Q6:

  A photographer will arrange 6 people of 6 different heights for photograph by placing them in two rows of three so that each person in the first row is standing in front of someone in the second row. The heights of the people within each row must increase from left to right, and each person in the second row must be taller than the person standing in front of him or her. How many such arrangements of the 6 people are possible?

  A. 5 B. 6 C. 9 D. 24 E. 36

  Answer:

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