The table above shows the distance, in kilometers, by the…
October 31, 2015
GMAT OFFICIAL GUIDE DS Solution: We are presented with the following table: We need to determine the value of x. From our table we see that the value of …
Tag: data sufficiency
In a random sample of 80 adults, how many are college…
October 31, 2015
GMAT OFFICIAL GUIDE DS Solution: We need to determine the number of college graduates in a sample of 80 adults. Because some of the 80 adults are college graduates, …
If p1 and p2 are the populations and r1 and r2
October 31, 2015
GMAT OFFICIAL GUIDE DS Solution: We are given the following: p_1 = population of District 1 p_2 = population of District 2 r_1 = the numbers of representatives of …
Can a certain rectangular sheet of glass be positioned…
October 31, 2015
GMAT OFFICIAL GUIDE DS Solution: We need to determine whether a rectangular sheet of glass can cover an entire rectangular tabletop. We are given that the edges must be …
Is 4^(x + y) = 8^(10) ? (1) x – y = 9 (2) y/x = 1/4
October 31, 2015
GMAT OFFICIAL GUIDE DS Solution: We need to determine whether 4^(x+y) = 8^10. We start by breaking down our two bases into prime factors. 4^(x+y) = (2^2)^(x+y) = 2^(2x+2y) …
We are given that the selling price of an article is equal to the cost of the article…
October 31, 2015
GMAT OFFICIAL GUIDE DS Solution: We are given that the selling price of an article is equal to the cost of the article plus the markup. We define some …
Terry holds 12 cards, each of which is red, white, green, or blue. If…
October 31, 2015
GMAT OFFICIAL GUIDE DS Solution: We are given that Terry has 12 total cards. The cards are colored red, white, green, or blue. We need to determine whether the …
A scientist recorded the number of eggs in each of 10 birds…
October 31, 2015
GMAT OFFICIAL GUIDE DS Solution: We are asked to determine the standard deviation of the number of eggs in 10 nests. Statement One Alone: The average (arithmetic mean) number …