PrabhatKC
X is a set containing 7 different numbers. Y is a set containing 6 different positive numbers, all of which are memhers of set X. Is the mean of X equal to the mean of Y ? (1) The range of X is greater than the range of Y. (2) The sum of all the numbers in X is greater than the sum of all the numbers in Y.
Discussed here:
x-is-a-set-containing-7-different-numbers-y-is-a-set-containing-6-dif-250485.htmlP.S. Worth noting though that such type of pure algebraic questions are no longer a part of the
DS syllabus of the GMAT.
DS questions in GMAT Focus encompass various types of word problems, such as:
Word Problems
Work Problems
Distance Problems
Mixture Problems
Percent and Interest Problems
Overlapping Sets Problems
Statistics Problems
Combination and Probability Problems
While these questions may involve or necessitate knowledge of algebra, arithmetic, inequalities, etc., they will always be presented in the form of word problems. You won’t encounter pure "algebra" questions like, "Is x > y?" or "A positive integer n has two prime factors..."
Check GMAT Syllabus for Focus Edition
Hope it helps.
PrabhatKC
I got one last doubt for the sitting of mine.
Look at my solution and alternative solution. The first one answers the question while the second one doesn’t.
Discussed here:
material-m-costs-10-per-kg-and-material-n-costs-20-per-kg-if-25-kg-231368.html