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

 It is currently 24 May 2019, 14:21

### 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

# Nicky took three exams and averaged 88. What was the range

Author Message
Intern
Joined: 08 May 2011
Posts: 21
Nicky took three exams and averaged 88. What was the range  [#permalink]

### Show Tags

14 Jul 2017, 08:56
00:00

Difficulty:

35% (medium)

Question Stats:

90% (00:56) correct 10% (01:34) wrong based on 21 sessions

### HideShow timer Statistics

Nicky took three exams and averaged 88. What was the range of her 3 exams?

(1) The average of her last two exams was 85.
(2) The average of her first two exams was 84.

--== Message from the GMAT Club Team ==--

THERE IS LIKELY A BETTER DISCUSSION OF THIS EXACT QUESTION.
This discussion does not meet community quality standards. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.
Senior Manager
Joined: 28 Jun 2015
Posts: 290
Concentration: Finance
GPA: 3.5
Nicky took three exams and averaged 88. What was the range  [#permalink]

### Show Tags

Updated on: 15 Jul 2017, 21:52
1
Total score = 88*3 = 264.

Range = Maximum score - Minimum score.

(1) Sum of the last 2 exams = 85*2 = 170. So, the score in her first exam = 264-170 = 94. We may assume that this is the maximum score but we still don't know the minimum score.

(2) Sum of the first 2 exams = 84*2 = 168. Again, this doesn't tell us the whole story.

(1) + (2): Score in the first exam = 94, score in the last exam = 264-168 = 96, score in the second exam = 264-(94+96) = 74. So, the range = 96-74. So, both statements together are necessary to answer the question.
_________________
I used to think the brain was the most important organ. Then I thought, look what’s telling me that.

Originally posted by TimeTraveller on 14 Jul 2017, 10:04.
Last edited by TimeTraveller on 15 Jul 2017, 21:52, edited 1 time in total.
Retired Moderator
Status: Long way to go!
Joined: 10 Oct 2016
Posts: 1353
Location: Viet Nam
Nicky took three exams and averaged 88. What was the range  [#permalink]

### Show Tags

14 Jul 2017, 19:50
papagorgio wrote:
Nicky took three exams and averaged 88. What was the range of her 3 exams?

(1) The average of her last two exams was 85.
(2) The average of her first two exams was 84.

a + b + c = 88 * 3 = 264

(1) + (2):

b + c = 85 * 2 = 170 => a = (a+b+c) - (b+c) = 264 - 170 = 94
a + b = 84 * 2 = 168 => c = (a+b+c) - (a+b) = 264 - 168 = 96

b = (a+b) - a = 168 - 94 = 74

Range of set is 96 - 74 = 22. Answer C

--== Message from the GMAT Club Team ==--

THERE IS LIKELY A BETTER DISCUSSION OF THIS EXACT QUESTION.
This discussion does not meet community quality standards. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.

_________________
Nicky took three exams and averaged 88. What was the range   [#permalink] 14 Jul 2017, 19:50
Display posts from previous: Sort by