GMAT Changed on April 16th - Read about the latest changes here

 It is currently 27 May 2018, 18:06

### 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

10 May 2018, 16:53
00:00

Difficulty:

15% (low)

Question Stats:

78% (00:25) correct 23% (00:38) wrong based on 40 sessions

### HideShow timer Statistics

A T-shirt supplier charges $12 per T-shirt for the first 50 T-shirts in an order and$10 per T-shirt for each additional T-shirt in the order. If the charge for an order of T-shirts was $1500, how many T-shirts were in the order? A) 90 B) 125 C) 140 D) 150 E) 200 Senior Manager Joined: 02 Oct 2017 Posts: 499 Re: A T-shirt supplier charges$12 per T-shirt for the first 50 T-shirts i [#permalink]

### Show Tags

10 May 2018, 21:05
Let extra number of t shirt after 50 be x

12*50 + 10x=1500
10x=900
X=90

Total t-shirt=90+50=140

Posted from my mobile device
Intern
Joined: 24 Nov 2017
Posts: 34
Re: A T-shirt supplier charges $12 per T-shirt for the first 50 T-shirts i [#permalink] ### Show Tags 10 May 2018, 22:51 Total charge for the order =$1500
Charge @ $12 per T shirt for the first 50 = 50 * 12 = 600 Charge @$10 per T shirt beyond the first 50 = 1500 - 600 = 900.
Number of T Shirts in the order beyond the first 50 = 900/10 = 90.

Total number of T shirts in the order = 50 + 90 = 140
Choice C
SC Moderator
Joined: 22 May 2016
Posts: 1680
A T-shirt supplier charges $12 per T-shirt for the first 50 T-shirts i [#permalink] ### Show Tags 11 May 2018, 17:05 alanforde800Maximus wrote: A T-shirt supplier charges$12 per T-shirt for the first 50 T-shirts in an order and $10 per T-shirt for each additional T-shirt in the order. If the charge for an order of T-shirts was$1500, how many T-shirts were in the order?

A) 90
B) 125
C) 140
D) 150
E) 200

The trap here is forgetting to account for or to "add back" the first 50

I. Arithmetic
How many T-shirts were there in an order charge of $1500? Cost 1:$12 per T-shirt for first 50 = $600 Cost 2:$10 per T-shirt, for any number $$x$$ T-shirts, AFTER the first 50

T-shirt order total: $1500 (1) 50 T-shirts cost$600
($1500 -$600) = $900 remain (2)$900 = how many T-shirts?
$900/$10 per shirt = 90 shirts

Number of T-shirts in the order?
50 + 90 = 140

II. Algebra
Let $$x$$ = # of T-shirts

$$(12)(50) + (10)(x-50) = 1500$$
$$600 + 10x - 500 = 1500$$
$$10x + 100 = 1500$$
$$10x = 1400$$
$$x = 140$$

_________________

In the depths of winter, I finally learned
that within me there lay an invincible summer.

Target Test Prep Representative
Status: Founder & CEO
Affiliations: Target Test Prep
Joined: 14 Oct 2015
Posts: 2638
Location: United States (CA)
Re: A T-shirt supplier charges $12 per T-shirt for the first 50 T-shirts i [#permalink] ### Show Tags 14 May 2018, 16:53 alanforde800Maximus wrote: A T-shirt supplier charges$12 per T-shirt for the first 50 T-shirts in an order and $10 per T-shirt for each additional T-shirt in the order. If the charge for an order of T-shirts was$1500, how many T-shirts were in the order?

A) 90
B) 125
C) 140
D) 150
E) 200

We can let n = the total number of shirts and create the equation:

1500 = 12(50) + 10(n - 50)

1500 = 600 + 10n - 500

1400 = 10n

140 = n

_________________

Scott Woodbury-Stewart
Founder and CEO

GMAT Quant Self-Study Course
500+ lessons 3000+ practice problems 800+ HD solutions

Director
Status: It's near - I can see.
Joined: 13 Apr 2013
Posts: 978
Location: India
Concentration: International Business, Operations
GMAT 1: 480 Q38 V22
GPA: 3.01
WE: Engineering (Consulting)
Re: A T-shirt supplier charges $12 per T-shirt for the first 50 T-shirts i [#permalink] ### Show Tags 22 May 2018, 05:45 alanforde800Maximus wrote: A T-shirt supplier charges$12 per T-shirt for the first 50 T-shirts in an order and $10 per T-shirt for each additional T-shirt in the order. If the charge for an order of T-shirts was$1500, how many T-shirts were in the order?

A) 90
B) 125
C) 140
D) 150
E) 200

Simply make an equation:

12*50 +10*x = 1500 (Total order value)

600 + 10*x = 1500

x = (1500 - 600)/9

x = 90

So, total T shirts = 90 + 50 = 140

_________________

"Success is not as glamorous as people tell you. It's a lot of hours spent in the darkness."

Intern
Joined: 05 Aug 2016
Posts: 15
Location: United States
Concentration: General Management
GMAT 1: 730 Q50 V40
Re: A T-shirt supplier charges $12 per T-shirt for the first 50 T-shirts i [#permalink] ### Show Tags 22 May 2018, 06:08 Another approach to this problem is by back solving. As always, take a look at the answer choices after reading the prompt and think about what approach makes sense to you e.g. if have strong algebra fundamentals take that route, etc. I typically start with B then move to D depending on how big or small the choice is compared to what I'm looking for. Using B, we know the first 50-shirts are$12 a pop (50 shirts at $10 is$500, 50 shirts at $2 is$100; therefore, 50 shirts at $12 is$600). The remaining 75 shirts at $10 is$750. $600 +$750 = $1350 which is too low compared to the$1500 we need. Therefore eliminate B and A (choice A is smaller in value then choice B).

Move to choice D. Same approach as testing choice B and since 100 shirts remain we know that portion costs $1000. Total is$1000 + $600 =$1600, which is way larger in value than the $1500 we're looking for. Therefore, eliminate D and E and select Answer Choice C. Re: A T-shirt supplier charges$12 per T-shirt for the first 50 T-shirts i   [#permalink] 22 May 2018, 06:08
Display posts from previous: Sort by

# A T-shirt supplier charges \$12 per T-shirt for the first 50 T-shirts i

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics

 Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.