A certain rectangular window is twice as long…
May 11, 2015
GMAT OFFICIAL GUIDE PS Solution: We set up the dimensions of the rectangular window as w = width and l = length. We are given that the rectangular window …
A certain country had a total annual expenditure of $1.2 x 1…
May 11, 2015
GMAT OFFICIAL GUIDE PS Solution: The key to solving this problem is to accurately translate what is being asked to a mathematical expression. We need to determine the “per …
In a small snack shop, the average (arithmetic mean) revenue…
May 11, 2015
GMAT OFFICIAL GUIDE PS Solution: This is a problem testing us on our knowledge of weighted averages. To solve, we can set up a weighted average equation: (Revenue for …
A factory has 500 workers, 15 percent of whom are women. If…
May 11, 2015
GMAT OFFICIAL GUIDE PS Solution: To solve this problem we first need to determine the number of women. We know that there are 500 people and 15% of them …
Mary’s income is 60 percent more than Tim’s income…
May 11, 2015
GMAT OFFICIAL GUIDE PS Solution: To solve this problem we create variables for the income of Mary, Tim, and Juan, and then set up some equations. T = Tim’s …
List T consists of 30 positive decimals, none of which is an integer…
May 9, 2015
GMAT OFFICIAL GUIDE PS Solution: When reading through this question, notice that we are asked which of the following is a POSSIBLE value of E – S. This tells …
Xavier, Yvonne, and Zelda each try independently to solve a problem…
May 9, 2015
GMAT OFFICIAL GUIDE PS Solution: We are first given the individual probabilities that Xavier, Yvonne, and Zelda WILL solve the problem. We list these below: P(Xavier will solve) = …
If x + 5 > 2 and x – 3 < 7, the value of x must be…
May 9, 2015
GMAT OFFICIAL GUIDE PS Solution: Let’s isolate x in each inequality. x + 5 > 2 x > -3 Next we simplify x – 3 < 7. x – …