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

 It is currently 23 Mar 2019, 01:40

### 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

# A certain school has an average (arithmetic mean) of x students per in

Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 53795
A certain school has an average (arithmetic mean) of x students per in  [#permalink]

### Show Tags

20 Dec 2017, 02:56
00:00

Difficulty:

15% (low)

Question Stats:

77% (01:03) correct 23% (01:13) wrong based on 26 sessions

### HideShow timer Statistics

A certain school has an average (arithmetic mean) of x students per instructor. If there are 200 students in the school, which of the following expresses, in terms of x, the number of instructors in the school?

A. 200/x
B. 200x
C. (200 + x)/x
D. x
E. (200 + x)/(200x)

_________________
Senior Manager
Joined: 07 Oct 2017
Posts: 258
Re: A certain school has an average (arithmetic mean) of x students per in  [#permalink]

### Show Tags

20 Dec 2017, 05:29
A

X students/ instructor

We need to get no of instructor.
So play with the units.

If we divide students by (students/instructor) we will get no of instructors.

200/x

Sent from my ONEPLUS A3003 using GMAT Club Forum mobile app
_________________

Thank you =Kudos
The best thing in life lies on the other side of the pain.

Manager
Joined: 24 Nov 2016
Posts: 152
Re: A certain school has an average (arithmetic mean) of x students per in  [#permalink]

### Show Tags

20 Dec 2017, 11:44
Bunuel wrote:
A certain school has an average (arithmetic mean) of x students per instructor. If there are 200 students in the school, which of the following expresses, in terms of x, the number of instructors in the school?

A. 200/x
B. 200x
C. (200 + x)/x
D. x
E. (200 + x)/(200x)

Average of x students per instructor: $$x=\frac{students}{"1"instructor}$$

If students is 200, then: $$x = \frac{200}{instructors}; instructors = \frac{200}{x}$$

Re: A certain school has an average (arithmetic mean) of x students per in   [#permalink] 20 Dec 2017, 11:44
Display posts from previous: Sort by