A certain characteristic in a large population has a distribution that is symmetric about the mean m. If 68 percent of the distribution lies within one standard deviation d of the mean, what percent of the distribution is less than m + d? GMAT Explanation, Video Solution, and Additional Practice! A certain characteristic in a […]
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How to Prepare for the GMAT: Essential First Steps The following ten steps focus on how to prepare for the GMAT on your own. This is meant as a launch guide for the essential first stages of the preparation: getting a baseline score, setting goals, making a plan, and registering for a first exam. The
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For any positive integer n, the sum of the first n positive integers equals n(n+1)/2. What is the sum of all the even integers between 99 and 301? A. 10,100 B. 20,200 C. 22,650 D. 40,200 E. 45,150 Correct Answer: B Full explanation coming soon. Send us a note if you’d like this added to
From the consecutive integers -10 to 10 inclusive, 20 integers are randomly chosen with repetitions allowed. What is the least possible value of the product of the 20 integers? A. (-10)^20 B. (-10)^10 C. 0 D. –(10)^19 E. –(10)^20 Correct Answer: E Full explanation coming soon. Send us a note if you’d like this added
Seed mixture X is 40 percent ryegrass and 60 percent bluegrass by weight; seed mixture Y is 25 percent ryegrass and 75 % fescue. If a mixture of X and Y contains 30% ryegrass, what percent of the weight of the mixture is X? GMAT Explanation, Video Solution, and More Practice! Seed mixture X is
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