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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 ## When Jack picks olives for two hours... tagged by: swerve ##### This topic has 1 expert reply and 0 member replies ### Top Member ## When Jack picks olives for two hours... When Jack picks olives for two hours at three times his regular speed, he picks 10 pounds of olives more than Mac working for five hours at 80% of his regular speed. Therefore, if Mac picks olives for one hour at double his regular speeds, and Jack picks olives for four hours at 75% of his regular speed, then A. Jack picks double the amount of olives Mac picks B. Mac picks 10 pounds more than Jack C. Jack picks 10 pounds more than Jack D. Mac picks 5 more pounds than Jack E. Jack picks 5 more pounds than Mac The OA is E. Please, can any expert explain this PS question for me? I tried to solve it but I can't get the correct answer. I need your help. Thanks. ### GMAT/MBA Expert Legendary Member Joined 14 Jan 2015 Posted: 2667 messages Followed by: 122 members Upvotes: 1153 GMAT Score: 770 Top Reply swerve wrote: When Jack picks olives for two hours at three times his regular speed, he picks 10 pounds of olives more than Mac working for five hours at 80% of his regular speed. Therefore, if Mac picks olives for one hour at double his regular speeds, and Jack picks olives for four hours at 75% of his regular speed, then A. Jack picks double the amount of olives Mac picks B. Mac picks 10 pounds more than Jack C. Jack picks 10 pounds more than Jack D. Mac picks 5 more pounds than Jack E. Jack picks 5 more pounds than Mac The OA is E. Please, can any expert explain this PS question for me? I tried to solve it but I can't get the correct answer. I need your help. Thanks. Say Jack's regular rate = J and Mac's regular rate = M. If Jack works for two hours at three times his regular speed (3J) then he'll pick 2 * 3J = 6J pounds If Mac works for five hours at 80% of his regular speed (.8M) he'll pick 5*.8M = 4M pounds. We've told that the first quantity is 10 more than the second so 6J = 4M + 10, or 6J - 4M = 10 Therefore, if Mac picks olives for one hour at double his regular speeds, and Jack picks olives for four hours at 75% of his regular speed, then If Mac picks for one hour at double his regular speed (2M) he'll pick 2M pounds. If Jack picks for four hours at 75% of his regular speed, he'll pick 4*.75J = 3J pounds. Effectively, we're looking for the difference, or 3J - 2M. Well, if 6J - 4M = 10, and we divide both sides by 2, we'll get 3J - 2M = 5, or 3J = 2M + 5. So Jack is picking 5 pounds more than Mac. The answer is E _________________ Veritas Prep | GMAT Instructor Veritas Prep Reviews Save$100 off any live Veritas Prep GMAT Course

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