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

 It is currently 21 Oct 2019, 13:20

### 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

# If the crime rate in a certain region dropped by 28% last year to a ra

Author Message
TAGS:

### Hide Tags

SVP
Status: It's near - I can see.
Joined: 13 Apr 2013
Posts: 1687
Location: India
GPA: 3.01
WE: Engineering (Real Estate)
If the crime rate in a certain region dropped by 28% last year to a ra  [#permalink]

### Show Tags

07 Apr 2019, 04:56
1
00:00

Difficulty:

65% (hard)

Question Stats:

44% (01:52) correct 56% (02:36) wrong based on 27 sessions

### HideShow timer Statistics

If the crime rate in a certain region dropped by 28% last year to a rate of 500 crimes per 100,000 citizens, what was the approximate rate before the drop?

A. 500 crimes per 128,000 citizens

B. 640 crimes per 128,000 citizens

C. 695 crimes per 128,000 citizens

D. 640 crimes per 100,000 citizens

E. 695 crimes per 100,000 citizens

_________________
"Do not watch clock; Do what it does. KEEP GOING."
Math Expert
Joined: 02 Aug 2009
Posts: 8004
Re: If the crime rate in a certain region dropped by 28% last year to a ra  [#permalink]

### Show Tags

07 Apr 2019, 08:05
AkshdeepS wrote:
If the crime rate in a certain region dropped by 28% last year to a rate of 500 crimes per 100,000 citizens, what was the approximate rate before the drop?

A. 500 crimes per 128,000 citizens

B. 640 crimes per 128,000 citizens

C. 695 crimes per 128,000 citizens

D. 640 crimes per 100,000 citizens

E. 695 crimes per 100,000 citizens

Let us keep the citizens as same 100,000 as the choices have either 100,000 or 128,000.
We would look at 128,000 if the choices with 100,000 don't fit in.
If the citizens are same, only the numerator 500 will get affected...
28% drop means 72% of initial, so initial = $$\frac{500*100}{72}$$... Now this should be > $$\frac{500*100}{75}$$ or $$\frac{500*4}{3}=666.7$$.
Only E fits in..
If we lo0K at A, B and C , the numerator should be ore than 695 as the denominator has been increased.
_________________
GMAT Club Legend
Joined: 18 Aug 2017
Posts: 5027
Location: India
Concentration: Sustainability, Marketing
GPA: 4
WE: Marketing (Energy and Utilities)
Re: If the crime rate in a certain region dropped by 28% last year to a ra  [#permalink]

### Show Tags

09 Apr 2019, 02:44
1
AkshdeepS wrote:
If the crime rate in a certain region dropped by 28% last year to a rate of 500 crimes per 100,000 citizens, what was the approximate rate before the drop?

A. 500 crimes per 128,000 citizens

B. 640 crimes per 128,000 citizens

C. 695 crimes per 128,000 citizens

D. 640 crimes per 100,000 citizens

E. 695 crimes per 100,000 citizens

earlier rate x
and drop 28% = .72
so x*0.72 = 500/10^5
x= ~695 per 10^5
IMO E
Re: If the crime rate in a certain region dropped by 28% last year to a ra   [#permalink] 09 Apr 2019, 02:44
Display posts from previous: Sort by