The probability is 1/2 that a certain coin will turn up heads…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: In this problem, there are only two events that could occur for the 3 coin flips. Either the coin will land on tails zero …
Which of the following describes all values of x for which…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: To solve, we first isolate the x^2 in the inequality 1 – x^2 ≥ 0. So we have: 1 ≥ x^2 Next, we take …
If (x – 1)^2 = 400 which of the following could be the value…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: This is an interesting question because our initial instincts tell us to square x -1 by the FOIL method. However, an easier method is …
What is the difference between the sixth and the fifth terms…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: For the sixth term, we need to substitute 6 for n, and for the fifth term, we need to substitute 5 for n. Then …
Thirty percent of the members of a swim club have passed…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: We are given that 30 percent of the members of the have passed the lifesaving test. If we use variable T for the total …
Of 30 applicants for a job, 14 had at least 4 years’ experience…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: For this we can setup a table with 2 main categories: years of experience and degrees. These can be broken down further into: 1) …
During a certain season, a team won 80 percent of its first…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: We are first given that a team won 80 percent of its first 100 games. This means the team won 0.8 x 100 = …
Seven pieces of rope have an average (arithmetic mean) length of 68 centimeters…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: We need to first recognize that we are working with a maximum problem. This means that of the seven pieces of rope, we must …