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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 ## Probability tagged by: yoshi97 ##### This topic has 2 expert replies and 0 member replies ## Probability ## Timer 00:00 ## Your Answer A B C D E ## Global Stats Difficult Can someone help with this math question? Of all of the U.S. album sales 1989 (Taylor Swift) accounted for 25% of sales, Frozen (Various Artists) accounted for 24.1% of sales, In the Lonely Hour (Sam Smith) accounted for 8.2% of sales. What is the probability that a randomly selected album was something other than these three albums? Thanks ### GMAT/MBA Expert Elite Legendary Member Joined 23 Jun 2013 Posted: 10130 messages Followed by: 494 members Upvotes: 2867 GMAT Score: 800 Hi yoshi97, When posting a GMAT questions, you should make sure to post the 5 answer choices (as sometimes the answers provide a clue as to how to approach the question in the most efficient way possible or a shortcut to avoiding a math-heavy approach). Here we're told that of all of the U.S. album sales 1989 (Taylor Swift) accounted for 25% of sales, Frozen (Various Artists) accounted for 24.1% of sales, and In the Lonely Hour (Sam Smith) accounted for 8.2% of sales. We're asked for the probability of randomly selecting an album that is something OTHER than these three albums. These 3 albums account for 25 + 24.1 + 8.2 = 57.3% of the US Album sales, thus there would be a 57.3% chance of randomly selecting one of these albums and a 100 - 57.3 = 42.7% chance of NOT selecting one of these albums. Final Answer: 42.7% GMAT assassins aren't born, they're made, Rich _________________ Contact Rich at Rich.C@empowergmat.com ### GMAT/MBA Expert GMAT Instructor Joined 25 Apr 2015 Posted: 2444 messages Followed by: 18 members Upvotes: 43 yoshi97 wrote: Can someone help with this math question? Of all of the U.S. album sales 1989 (Taylor Swift) accounted for 25% of sales, Frozen (Various Artists) accounted for 24.1% of sales, In the Lonely Hour (Sam Smith) accounted for 8.2% of sales. What is the probability that a randomly selected album was something other than these three albums? Thanks The given percents add to: 25% + 24.1% + 8.2% = 57.3% = 0.573 So the probability of NOT selecting any of those albums is 1 - 0.573 = 0.427. Answer: 0.427 _________________ Scott Woodbury-Stewart Founder and CEO scott@targettestprep.com See why Target Test Prep is rated 5 out of 5 stars on BEAT the GMAT. Read our reviews • Award-winning private GMAT tutoring Register now and save up to$200

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