The figure above shows a circular flower bed…
May 21, 2015
GMAT OFFICIAL GUIDE PS Solution: The circular path (i.e., the shaded region) is called an annulus in geometry. Basically an annulus is a ring-shaped figure bounded by two concentric …
A committee is composed of w women and m men. If 3 women and…
May 21, 2015
GMAT OFFICIAL GUIDE PS Solution: To solve the problem we must remember that: probability = (number of favorable outcomes)/(total number of outcomes) In the problem we are being asked …
If (4 – x)/(2 + x) = x, what is the value of x^2 + 3x -4
May 21, 2015
GMAT OFFICIAL GUIDE PS Solution: We start by simplifying the given equation, (4-x)/(2+x) = x. We first multiply both sides by 2+x. Thus we have: 4 – x = …
A restaurant meal cost $35.50 and there was no tax…
May 21, 2015
A restaurant meal cost $35.50 and there was no tax… Solution: To solve, we can set up two equations, one for a tip of 10% and another for a …
If the operation @ is defined by x@y=(xy)^1/2 for all …
May 21, 2015
GMAT OFFICIAL GUIDE PS Solution: We are given that the operation ⊙ is defined by x⊙y = √(xy) for all positive numbers. We are next given that (5⊙45)⊙60. Following …
An operation @ is defined by the equation a@b = (a – b) / (a…
May 21, 2015
GMAT OFFICIAL GUIDE PS Solution: We are given that operation Ө is defined by aӨb = (a-b)/(a+b). We are also given that aӨc = 0; thus, according to the …
If the median of the numbers in list I above is equal to the…
May 21, 2015
GMAT OFFICIAL GUIDE PS Solution: We start by calculating the median of the numbers of list I: 3, 6, 8, 19. We see that the numbers in the list …
David has d books, which is 3 times as many as Jeff…
May 21, 2015
GMAT OFFICIAL GUIDE PS – Solution: Although we could plug in a real value for d, the problem can be just as easily solved by setting up equations. So …