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100 points for $49 worth of Veritas practice GMATs FREE VERITAS PRACTICE GMAT EXAMS Earn 10 Points Per Post Earn 10 Points Per Thanks Earn 10 Points Per Upvote ## What is the average of 1/2, 2/5 and 3/10? tagged by: VJesus12 ##### This topic has 2 expert replies and 1 member reply ### Top Member ## What is the average of 1/2, 2/5 and 3/10? What is the average of 1/2, 2/5 and 3/10? A. 1/5 B. 3/10 C. 2/5 D. 1/2 E. 6/5 The OA is the option C. Experts, is there a fast way to solve this PS question? Thanks in advanced. ### GMAT/MBA Expert Elite Legendary Member Joined 23 Jun 2013 Posted: 10197 messages Followed by: 497 members Upvotes: 2867 GMAT Score: 800 Top Reply Hi VJesus12, We're asked to find the average of 1/2, 2/5 and 3/10. With many GMAT questions (in both the Quant and Verbal sections), the way that you choose to organize your information will greatly impact how quickly you can answer the specific question that is asked. Here, converting these three fractions to decimals creates a significant 'shortcut' that can help you to quickly answer the question. 1/2 = .5 2/5 = .4 3/10 = .3 Since the three numbers are 'evenly spaced' out, the average will be the MIDDLE number... Final Answer: C GMAT assassins aren't born, they're made, Rich _________________ Contact Rich at Rich.C@empowergmat.com ### GMAT/MBA Expert GMAT Instructor Joined 04 Oct 2017 Posted: 551 messages Followed by: 11 members Upvotes: 180 Hello Vjesus12. Let's see your question. We can rewrite this numbers to get an easy way to find the average. We can rewrite and reorder the numbers as follows: $$\frac{3}{10}\ \ \ ,\ \ \ \ \ \frac{2}{5}=\frac{4}{10}\ \ \ ,\ \ \ \ \frac{1}{2}=\frac{5}{10}\ .$$ Therefore, the average is given by $$\frac{\frac{3}{10}+\frac{4}{10}+\frac{5}{10}}{3}=\ \frac{\frac{12}{10}}{3}=\frac{12}{30}=\frac{2}{5}.$$ So, the correct answer is the option C=2/5. I hope this explanation may help you. I'm available if you'd like a follow-up. Regards. _________________ GMAT Prep From The Economist We offer 70+ point score improvement money back guarantee. Our average student improves 98 points. Free 7-Day Test Prep with Economist GMAT Tutor - Receive free access to the top-rated GMAT prep course including a 1-on-1 strategy session, 2 full-length tests, and 5 ask-a-tutor messages. Get started now. Master | Next Rank: 500 Posts Joined 29 Nov 2017 Posted: 100 messages Upvotes: 14 VJesus12 wrote: What is the average of 1/2, 2/5 and 3/10? A. 1/5 B. 3/10 C. 2/5 D. 1/2 E. 6/5 The OA is the option C. Experts, is there a fast way to solve this PS question? Thanks in advanced. The faster way depends on the given fractions only . For example in this case you clearly see that the fractions are equal to 0.5, 0.4 and 0.3 and their average as is visible = 0.4 = 2/5 Hence option C • Magoosh Study with Magoosh GMAT prep Available with Beat the GMAT members only code • 5-Day Free Trial 5-day free, full-access trial TTP Quant Available with Beat the GMAT members only code • FREE GMAT Exam Know how you'd score today for$0

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