Tag: Problem Solving
GMAT OFFICIAL GUIDE PS Solution: We can create the following equation: Total houses = number with air conditioning + number with sunporch + number with pool – number with …
GMAT OFFICIAL GUIDE PS The figure shown above consists of a shaded 9-sided polygon and 9 unshaded isosceles triangles… Solution: Since we have a 9-sided polygon (also known as …
GMAT OFFICIAL GUIDE PS Solution: We need to determine the number of ways to lineup male, female, male, female, male, female. Since there are 3 males, we have 3 …
Solution: We are looking for two consecutive times (when the door opened) with a gap of more than 15 minutes, since only then the light would be off. Since …
GMAT OFFICIAL GUIDE PS Solution: Let’s review two rules for the standard deviation: 1. Adding a constant to each value in a data set does not change the value …
GMAT OFFICIAL GUIDE PS Solution: Since the order of the books in her list matters, we use permutation. Thus, the number of ways 4 books can be chosen and …
GMAT OFFICIAL GUIDE PS Solution: We are given two decimals: 0.1X and 0.02Y To make 0.1X the greatest, we can let X = 9 and we have: 0.19 To …
GMAT OFFICIAL GUIDE PS Solution: Let’s test each answer choice: A) From Day 1 to Day 2 |(12 – 20)/20| x 100 = |-8/20| x 100 = 40% B) …
