GMAT DATA SUFFICIENCY PRACTICE QUESTIONS

 1. What percent of a group of people are women with red hair?
 (1) Of the women in the group, 5 percent have red hair.
 (2) Of the men in the group, 10 percent have red hair.

2. In a certain class, one student is to be selected at random to read. What is the probability that a boy will read?
(1) Two-thirds of the students in the class are boys.
(2) Ten of the students in the class are girls.

3. If the two floors in a certain building are 9 feet apart, how many steps are there in a set of stairs that extends from the first floor to the second floor of the building?
 (1) Each step is 3/4 foot high.
 (2) Each step is 1 foot wide.

4.  In College X the number of students enrolled in both a chemistry course and a biology course is how much less than the number of students enrolled in neither? 
(1) In College X there are 60 students enrolled in a chemistry course.
(2) In College X there are 85 students enrolled in a biology course.


ANSWER ( AVAILABLE JUST FOR PRINTING EDITION)

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