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20 Dec 2015, 03:13
2
00:00

Difficulty:

45% (medium)

Question Stats:

64% (01:32) correct 36% (01:49) wrong based on 185 sessions

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An author received $0.80 in royalties for each of the first 100,000 copies of her book sold, and$0.60 in royalties for each additional copy sold. If she received a total of $260,000 in royalties, how many copies of her book were sold? (A) 130,000 (B) 300,000 (C) 380,000 (D) 400,000 (E) 420,000 My Solution: Lets assume total number of books sold = N 0.8 * 100,000 + (N-100,000) 6/10 = 260,000 (N-100,000) 6/10 = 260,000-80,000 = 180,000 Plugin answers: I prefer to start with C, but B and D are easy to calculate. I pick D to start with. (400,000 - 100, 000) 6/10= 300,000 * 6/10 = 180,000 Match with LHS to RHS. Answer D is correct. _________________ Discipline does not mean control. Discipline means having the sense to do exactly what is needed. Senior Manager Joined: 10 Mar 2013 Posts: 465 Location: Germany Concentration: Finance, Entrepreneurship Schools: WHU MBA"20 (A) GMAT 1: 580 Q46 V24 GPA: 3.88 WE: Information Technology (Consulting) Re: An author received$0.80 in royalties for each of the first 100,000 co  [#permalink]

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20 Dec 2015, 03:35
3
1
Rsohal wrote:
An author received $0.80 in royalties for each of the first 100,000 copies of her book sold, and$0.60 in royalties for each additional copy sold. If she received a total of $260,000 in royalties, how many copies of her book were sold? (A) 130,000 (B) 300,000 (C) 380,000 (D) 400,000 (E) 420,000 My Solution: Lets assume total number of books sold = N 0.8 * 100,000 + (N-100,000) 6/10 = 260,000 (N-100,000) 6/10 = 260,000-80,000 = 180,000 Plugin answers: I prefer to start with C, but B and D are easy to calculate. I pick D to start with. (400,000 - 100, 000) 6/10= 300,000 * 6/10 = 180,000 Match with LHS to RHS. Answer D is correct. $$0.8*10^5+0.6*(x-10^5)=260000$$ $$10^5*0.2+0.6x=260000$$ $$x=400000$$ Answer D _________________ When you’re up, your friends know who you are. When you’re down, you know who your friends are. Share some Kudos, if my posts help you. Thank you ! 800Score ONLY QUANT CAT1 51, CAT2 50, CAT3 50 GMAT PREP 670 MGMAT CAT 630 KAPLAN CAT 660 Intern Joined: 30 May 2014 Posts: 15 WE: Information Technology (Consulting) Re: An author received$0.80 in royalties for each of the first 100,000 co  [#permalink]

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20 Dec 2015, 04:04
2
1
Rsohal wrote:
An author received $0.80 in royalties for each of the first 100,000 copies of her book sold, and$0.60 in royalties for each additional copy sold. If she received a total of $260,000 in royalties, how many copies of her book were sold? (A) 130,000 (B) 300,000 (C) 380,000 (D) 400,000 (E) 420,000 Total royalties for first 100.000 books = .8*100,000= 80,000 Total royalties for the rest of the books = 260,000-80,000 = 180,000 Remaining books = 180,000/0.6 = 300,000 Total books = 300,000+100,000 = 400,000 Answer D Target Test Prep Representative Status: Founder & CEO Affiliations: Target Test Prep Joined: 14 Oct 2015 Posts: 8109 Location: United States (CA) Re: An author received$0.80 in royalties for each of the first 100,000 co  [#permalink]

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21 Jan 2018, 19:53
RSOHAL wrote:
An author received $0.80 in royalties for each of the first 100,000 copies of her book sold, and$0.60 in royalties for each additional copy sold. If she received a total of $260,000 in royalties, how many copies of her book were sold? (A) 130,000 (B) 300,000 (C) 380,000 (D) 400,000 (E) 420,000 If we let n = the total number of copies sold, then (n - 100,000) is the number of additional copies (those in excess of 100,000) sold, and we can create the equation: 260,000 = 0.8 x 100,000 + 0.6(n - 100,000) 260,000 = 80,000 + 0.6n - 60,000 240,000 = 0.6n 400,000 = n Answer: D _________________ # Scott Woodbury-Stewart Founder and CEO Scott@TargetTestPrep.com 122 Reviews 5-star rated online GMAT quant self study course See why Target Test Prep is the top rated GMAT quant course on GMAT Club. Read Our Reviews If you find one of my posts helpful, please take a moment to click on the "Kudos" button. Re: An author received$0.80 in royalties for each of the first 100,000 co   [#permalink] 21 Jan 2018, 19:53
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