GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 25 Jun 2018, 02:51

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

### Show Tags

20 Dec 2015, 03:13
2
00:00

Difficulty:

55% (hard)

Question Stats:

64% (00:58) correct 36% (01:23) wrong based on 128 sessions

### HideShow timer Statistics

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. Director Joined: 10 Mar 2013 Posts: 562 Location: Germany Concentration: Finance, Entrepreneurship 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]

### Show Tags

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]

### Show Tags

20 Dec 2015, 04:04
2
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: 2789 Location: United States (CA) Re: An author received$0.80 in royalties for each of the first 100,000 co [#permalink]

### Show Tags

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 GMAT Quant Self-Study Course 500+ lessons 3000+ practice problems 800+ HD solutions Re: An author received$0.80 in royalties for each of the first 100,000 co   [#permalink] 21 Jan 2018, 19:53
Display posts from previous: Sort by