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Register now and save up to $200 Available with Beat the GMAT members only code • 5 Day FREE Trial Study Smarter, Not Harder Available with Beat the GMAT members only code • Magoosh Study with Magoosh GMAT prep Available with Beat the GMAT members only code • Free Trial & Practice Exam BEAT THE GMAT EXCLUSIVE Available with Beat the GMAT members only code • 5-Day Free Trial 5-day free, full-access trial TTP Quant Available with Beat the GMAT members only code • Free Practice Test & Review How would you score if you took the GMAT Available with Beat the GMAT members only code • Free Veritas GMAT Class Experience Lesson 1 Live Free Available with Beat the GMAT members only code ## OG16 - DS 160 This topic has 1 expert reply and 2 member replies amina.shaikh309 Senior | Next Rank: 100 Posts Joined 23 Apr 2016 Posted: 31 messages #### OG16 - DS 160 Tue May 24, 2016 7:42 am ttp://postimg.org/image/6uw34wdvf/" target="_blank"> ### GMAT/MBA Expert GMATGuruNY GMAT Instructor Joined 25 May 2010 Posted: 13755 messages Followed by: 1802 members Upvotes: 13060 GMAT Score: 790 Tue May 24, 2016 8:09 am Quote: What amount did Jean earn from the commission on her sales in the first half of 1988 ? (1) In 1988 Jean's commission was 5 percent of the total amount of her sales. (2) The amount of Jean's sales in the second half of 1988 averaged$10,000 per month more than in the first half
Statement 1:
If Jean's total sales = $100, then her commission = 5% of 100 =$5.
If Jean's total sales = $1000, then her commission = 5% of 1000 =$50.
Since her commission can be different values, INSUFFICIENT.

Statement 2:
Since the commission rate is unknown, INSUFFICIENT.

Statements combined:
Case 1: Sales for the first half of the year = $10000 per month, sales for the second half of the year =$20000 per month
In this case:
Total sales = (6*10000) + (6*20000) = $180,000. Commission = 5% of 180,000 =$9,000.

Case 2: Sales for the first half of the year = $20000 per month, sales for the second half of the year =$30000 per month
In this case:
Total sales = (6*20000) + (6*30000) = $300,000. Commission = 5% of$300,000 = $15,000. Since the commission can be different values, INSUFFICIENT. The correct answer is E. _________________ Mitch Hunt GMAT Private Tutor GMATGuruNY@gmail.com If you find one of my posts helpful, please take a moment to click on the "UPVOTE" icon. Available for tutoring in NYC and long-distance. For more information, please email me at GMATGuruNY@gmail.com. Free GMAT Practice Test How can you improve your test score if you don't know your baseline score? Take a free online practice exam. Get started on achieving your dream score today! Sign up now. OptimusPrep Master | Next Rank: 500 Posts Joined 13 Mar 2015 Posted: 410 messages Followed by: 7 members Upvotes: 120 GMAT Score: 770 Thu May 26, 2016 7:10 pm amina.shaikh309 wrote: ttp://postimg.org/image/6uw34wdvf/" target="_blank"> Required: How much did Jean earn in commission in first half of 1988 Statement 1: In 1988 Jean's commission was 5 percent of the total amount of her sales Since we do not know the total sales, we cannot find the commission. INSUFFICIENT Statement 2: The amount of Jean's sales in the second half of 1988 averaged$10,000 per month more than in the first half
Nothing discussed about the commission percentage.
Clearly INSUFFICIENT

Combining both statements:
We just know the difference between the sales of both halves, but not the absolute values.
The commission will depend on the absolute values.
Still INSUFFICIENT

Correct Option: E

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nchaswal Senior | Next Rank: 100 Posts
Joined
17 Apr 2015
Posted:
44 messages
Followed by:
2 members
6
Target GMAT Score:
760
GMAT Score:
740
Sat May 28, 2016 5:48 am
Amina

I have a question for you. How long did it take you to solve this ? And did you solve this correctly ?

This is hardly a 1 Min question and just like I explained in one of the problems you posted, if some key principles are etched in your mind you do not have to spend much time on a problem. It is just like knowing multiplication table of 5. You can never forget it and it is always at ur finger tips that any multiple of 5 can either have last digit as 5 or 0.

Statement 1:INSUFFICIENT ( 10 secs)

Again as the question is EXACT value Q, only % will not give you answer.

Statement 2: INSUFFICIENT (15 secs)

The variable X is first half sales. This statement gives no info about X.

COMBINE: INSUFFICIENT (20-30 secs)

You have the % but you still do not have X so no point thinking further.

You saved almost more than 1 min by keeping some simple rules at tips.

Cheers

_________________
It is GMAT. So what?

Thanked by: amina.shaikh309

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