It is currently 21 Apr 2019, 12:33

### 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

# 4,400 participants in a study were surveyed regarding side

Author Message
TAGS:
GRE Prep Club Legend
Joined: 07 Jun 2014
Posts: 4857
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
Followers: 106

Kudos [?]: 1820 [2] , given: 397

4,400 participants in a study were surveyed regarding side [#permalink]  05 Jul 2016, 04:29
2
KUDOS
Expert's post
00:00

Question Stats:

40% (01:14) correct 59% (01:20) wrong based on 32 sessions
4,400 participants in a study were surveyed regarding side effects of a new medication, and x percent reported experiencing drowsiness. If x is rounded to the nearest integer, the result is 8. Which of the following could be the number of survey participants who reported experiencing drowsiness?

Indicate all such values.

A. 325
B. 330
C. 352
D. 375

[Reveal] Spoiler: OA
B and C
[Reveal] Spoiler: OA

_________________

Sandy
If you found this post useful, please let me know by pressing the Kudos Button

Try our free Online GRE Test

Manager
Joined: 23 Jan 2016
Posts: 137
Followers: 3

Kudos [?]: 110 [1] , given: 15

Re: 4,400 participants in a study were surveyed regarding side [#permalink]  11 Jul 2016, 04:54
1
KUDOS
if x is rounded to 8 then x must be between 7.5 and 8.4 inclusive. 7.5 % of 4400 is 330 and 8.4% of 4400 is 369.6. So number of survey participants who reported experiencing drowsiness is between 330 and 369.6. Hence answer is B and C
Intern
Joined: 26 Aug 2017
Posts: 31
Followers: 0

Kudos [?]: 18 [0], given: 7

Re: 4,400 participants in a study were surveyed regarding side [#permalink]  26 Aug 2017, 05:56
if x is rounded to 8 then x must be between 7.5 and 8.4 inclusive. 7.5 % of 4400 is 330 and 8.4% of 4400 is 369.6. So number of survey participants who reported experiencing drowsiness is between 330 and 369.6. Hence answer is B and C

Should be between 7.5 and 8.5. With 8.4 inclusive you are excluding the possibility of 8.45%, 8.49%, 8.499%, etc. The range is 330 - 374.
Manager
Joined: 01 Nov 2018
Posts: 87
Followers: 0

Kudos [?]: 43 [1] , given: 22

Re: 4,400 participants in a study were surveyed regarding side [#permalink]  09 Jan 2019, 23:18
1
KUDOS
Expert's post
Lemme know if this shortcut helps.
we know that x is between 7.5 and 8.5 percent because they didnt say if it was rounded up or down.
First:
1 percent of 4400 = 44
then 8.5 percent of 4400 = 8*44 + 1/2* 44= 374
7.5 percent of 4400 = 7* 44* 1/2* 44= 330
8 percent of 4400 = 8*44= 352

the choice is between 330 and 374, no more, no less
Supreme Moderator
Joined: 01 Nov 2017
Posts: 370
Followers: 5

Kudos [?]: 110 [0], given: 4

Re: 4,400 participants in a study were surveyed regarding side [#permalink]  10 Jan 2019, 04:00
Expert's post
sandy wrote:
4,400 participants in a study were surveyed regarding side effects of a new medication, and x percent reported experiencing drowsiness. If x is rounded to the nearest integer, the result is 8. Which of the following could be the number of survey participants who reported experiencing drowsiness?

Indicate all such values.

A. 325
B. 330
C. 352
D. 375

[Reveal] Spoiler: OA
B and C

The equation will be $$7.5\leq{x}<8.5$$...
So, the number, say n, will lie in the range $$4400*8.5>n\geq{7.5*4400}$$, that is $$374>n\geq{330}$$
so B and C
_________________

Some useful Theory.
1. Arithmetic and Geometric progressions : https://greprepclub.com/forum/progressions-arithmetic-geometric-and-harmonic-11574.html#p27048
2. Effect of Arithmetic Operations on fraction : https://greprepclub.com/forum/effects-of-arithmetic-operations-on-fractions-11573.html?sid=d570445335a783891cd4d48a17db9825
3. Remainders : https://greprepclub.com/forum/remainders-what-you-should-know-11524.html
4. Number properties : https://greprepclub.com/forum/number-property-all-you-require-11518.html
5. Absolute Modulus and Inequalities : https://greprepclub.com/forum/absolute-modulus-a-better-understanding-11281.html

Manager
Joined: 26 Jan 2018
Posts: 184
Followers: 0

Kudos [?]: 114 [0], given: 3

Re: 4,400 participants in a study were surveyed regarding side [#permalink]  14 Jan 2019, 02:34
Using calculator will help to answer the question in around 15 to 20 seconds
Re: 4,400 participants in a study were surveyed regarding side   [#permalink] 14 Jan 2019, 02:34
Display posts from previous: Sort by