Check GMAT Club Decision Tracker for the Latest School Decision Releases https://gmatclub.com/AppTrack

 It is currently 26 May 2017, 21:49

### 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

# _____________________________________________ | Amount

Author Message
Director
Joined: 17 Sep 2005
Posts: 910
Followers: 4

Kudos [?]: 78 [0], given: 0

### Show Tags

09 Sep 2007, 16:13
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

### HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

_____________________________________________
| Amount earned per day| $96 |$84 | $80 |$70 | $48 | ____________________________________________ | Number of Days | 4 | 7 | 4 | 3 | 2 | _____________________________________________ A student worked for 20 days. For each of the amounts shown in the first row of the table, the second row gives the number of days that the student earned that amount. What is the median amount of money that the student earned per day for the 20 days? 1.$96
2. $84 3.$80
4. $70 5.$48

- Brajesh
Current Student
Joined: 28 Dec 2004
Posts: 3363
Location: New York City
Schools: Wharton'11 HBS'12
Followers: 16

Kudos [?]: 297 [0], given: 2

### Show Tags

09 Sep 2007, 21:31
guys..please show working..is there a quick way to do these type of problems...i cant possibly thnk you would actually add the numbers up and divide by 20??
Current Student
Joined: 28 Dec 2004
Posts: 3363
Location: New York City
Schools: Wharton'11 HBS'12
Followers: 16

Kudos [?]: 297 [0], given: 2

### Show Tags

09 Sep 2007, 21:40
my quick way of doing this..

4(96)+7(84)+4(80)+3(70)+2(48)

4(96+80)+7(84)+3(70)

so i basically list the numbers by their frequency

70 70 70 80 80 80 80 84......84(7 times) 96 96 96 96

clearly the median has to be the middle two numbers, which are 84 and 84

(84+84)/2=84

Director
Joined: 03 May 2007
Posts: 875
Schools: University of Chicago, Wharton School
Followers: 6

Kudos [?]: 209 [0], given: 7

### Show Tags

09 Sep 2007, 21:56
fresinha12 wrote:
guys..please show working..is there a quick way to do these type of problems...i cant possibly thnk you would actually add the numbers up and divide by 20??

= (20+1)/2 =10.5

so the average between the values of 10th day and 11th day is the median.
10th day value = 84
11th day value = 84
so average of these two = 84

its so quick. took less than 10 sec.
Senior Manager
Joined: 27 Aug 2007
Posts: 253
Followers: 1

Kudos [?]: 12 [0], given: 0

### Show Tags

09 Sep 2007, 22:39
The quickest way to solve it, in my opinion, shown by Fistail. Though you have to order the numbers viusally, I mean just count which is 10.5 in row.

Ans: B:84
GMAT Club Legend
Joined: 07 Jul 2004
Posts: 5045
Location: Singapore
Followers: 31

Kudos [?]: 376 [0], given: 0

### Show Tags

09 Sep 2007, 22:45
Since we have even number of elements (days), the median is the mean of the 10th and 11th element. From the chart, we know this is $84 since both 10th and 11th element is$84.
Director
Joined: 17 Sep 2005
Posts: 910
Followers: 4

Kudos [?]: 78 [0], given: 0

### Show Tags

10 Sep 2007, 06:21
OA is B.

Thanks,
Brajesh
Manager
Joined: 29 Aug 2007
Posts: 110
Followers: 1

Kudos [?]: 9 [0], given: 0

### Show Tags

10 Sep 2007, 07:13
Median of a list of numbers is the mid point.

Median = 84
10 Sep 2007, 07:13
Display posts from previous: Sort by