In a box of 12 pens, a total of 3 are defective. If a customer…
May 10, 2016
GMAT OFFICIAL GUIDE PS Solution: We are given that in a box of 12 pens, 3 are defective and thus 9 are not defective. We must determine the probability …
Author: Jeff Miller
The interior of a rectangular carton is designed by a certain…
May 10, 2016
GMAT OFFICIAL GUIDE PS Solution: We are given that the ratio of length: width: height = 3 : 2 : 2 and we are also given that the volume …
A total of 22 men and 26 women were at a party…
May 10, 2016
GMAT OFFICIAL GUIDE PS Solution: 1) Since there are 48 people (22 men and 26 women) and the average age of all of them is 35, the total ages …
If n is a positive integer and the product of all integers…
May 10, 2016
GMAT OFFICIAL GUIDE PS Solution: We are given that the product of all integers from 1 to n, inclusive, (i.e., n!) is a multiple of 990. Thus, n! = …
Each person who attended a company meeting was either…
May 10, 2016
GMAT OFFICIAL GUIDE PS Solution: This is an overlapping set question, and a good way to solve it is to set up a table with two categories: stockholder and …
A certain high school has 5000 students. Of these students, x are
May 10, 2016
GMAT OFFICIAL GUIDE PS Solution: We are given an overlapping set with 2 categories: music and art. In any two-category set problem we can use the following formula: Total …
√(4.8 x 10^9) is closest in value to…
May 10, 2016
GMAT OFFICIAL GUIDE PS Solution: We are given √(4.8 x 10^9), and we need to determine the answer choice that is closest in value. We first simplify the expression …
If xy ≠ 0 and x^2y^2 − xy = 6, which of the following could be y in…
May 10, 2016
GMAT OFFICIAL GUIDE PS Solution: We are given the equation, (x^2)(y^2) – xy = 6, and, although it may not be obvious, the equation is a quadratic-format equation. Thus, …