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

 It is currently 11 Dec 2018, 12:22

### 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 December
PrevNext
SuMoTuWeThFrSa
2526272829301
2345678
9101112131415
16171819202122
23242526272829
303112345
Open Detailed Calendar
• ### Free GMAT Prep Hour

December 11, 2018

December 11, 2018

09:00 PM EST

10:00 PM EST

Strategies and techniques for approaching featured GMAT topics. December 11 at 9 PM EST.
• ### The winning strategy for 700+ on the GMAT

December 13, 2018

December 13, 2018

08:00 AM PST

09:00 AM PST

What people who reach the high 700's do differently? We're going to share insights, tips and strategies from data we collected on over 50,000 students who used examPAL.

# How much precipitation does Springfield need this month to attain its

Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 51100
How much precipitation does Springfield need this month to attain its  [#permalink]

### Show Tags

21 Jan 2016, 03:49
00:00

Difficulty:

45% (medium)

Question Stats:

85% (01:21) correct 15% (01:50) wrong based on 30 sessions

### HideShow timer Statistics

How much precipitation does Springfield need this month to attain its long-term average of 35 inches per year?

(1) Over the last 11 months, the city has averaged 3 inches of precipitation per month.
(2) Springfield has accumulated 94.3% of its mean annual precipitation during the last 11 months.

_________________
SC Moderator
Joined: 13 Apr 2015
Posts: 1687
Location: India
Concentration: Strategy, General Management
GMAT 1: 200 Q1 V1
GPA: 4
WE: Analyst (Retail)
Re: How much precipitation does Springfield need this month to attain its  [#permalink]

### Show Tags

21 Jan 2016, 20:14
St1: Over the last 11 months, the city has averaged 3 inches of precipitation per month.
This statement is sufficient if we assume that "this month" refers to the final month of the year.
But, if its not the final month of the year then the average precipitation is dependent on the months remaining in the year
St1 is not sufficient

St2: Springfield has accumulated 94.3% of its mean annual precipitation during the last 11 months.
This statement is similar to statement 1. It provides total precipitation value for the previous 11 months as (0.943)*(35). This statement is sufficient if the month refers to the final month of the year. If its not the final month then its not sufficient.

Combining St1 and St2, we still get the value for the previous 11 months. But we do not have any information to suggest that the previous 11 months refers to the first 11 months of the year.

Math Expert
Joined: 02 Aug 2009
Posts: 7099
Re: How much precipitation does Springfield need this month to attain its  [#permalink]

### Show Tags

21 Jan 2016, 20:20
1
Vyshak wrote:
St1: Over the last 11 months, the city has averaged 3 inches of precipitation per month.
This statement is sufficient if we assume that "this month" refers to the final month of the year.
But, if its not the final month of the year then the average precipitation is dependent on the months remaining in the year
St1 is not sufficient

St2: Springfield has accumulated 94.3% of its mean annual precipitation during the last 11 months.
This statement is similar to statement 1. It provides total precipitation value for the previous 11 months as (0.943)*(35). This statement is sufficient if the month refers to the final month of the year. If its not the final month then its not sufficient.

Combining St1 and St2, we still get the value for the previous 11 months. But we do not have any information to suggest that the previous 11 months refers to the first 11 months of the year.

hi Vyshak,
the wordings used ..
How much precipitation does Springfield need this month to attain its long-term average of 35 inches per year?..
the moment we say what we require this month to equal some yearly average, it should be taken that the value of this month is sufficient to answer..
In this scenario, both the statements should be suff and answer should be D
_________________

1) Absolute modulus : http://gmatclub.com/forum/absolute-modulus-a-better-understanding-210849.html#p1622372
2)Combination of similar and dissimilar things : http://gmatclub.com/forum/topic215915.html
3) effects of arithmetic operations : https://gmatclub.com/forum/effects-of-arithmetic-operations-on-fractions-269413.html

GMAT online Tutor

SC Moderator
Joined: 13 Apr 2015
Posts: 1687
Location: India
Concentration: Strategy, General Management
GMAT 1: 200 Q1 V1
GPA: 4
WE: Analyst (Retail)
Re: How much precipitation does Springfield need this month to attain its  [#permalink]

### Show Tags

21 Jan 2016, 20:56
Thanks chetan2u for helping me understand the question. Are there any similar ds questions so that i can practice on the different variations of the usage of year concept.
Moderator
Joined: 21 Jun 2014
Posts: 1092
Location: India
Concentration: General Management, Technology
GMAT 1: 540 Q45 V20
GPA: 2.49
WE: Information Technology (Computer Software)
Re: How much precipitation does Springfield need this month to attain its  [#permalink]

### Show Tags

23 Jan 2016, 01:28
Average of 12 months= 35
precipitation for 12th month = ??

statement-1: we know the average of 11 months and we are given the required average for 12 months then precipitation for 12th month can be found.

Statement-2: Again already covered average is given for 11 month and we are given the required average for 12 months then again we can find the precipitation for 12 months.

Option D is the correct answer.
_________________

---------------------------------------------------------------
Target - 720-740
Project PS Butler - https://gmatclub.com/forum/project-ps-butler-practice-everyday-280904.html
http://gmatclub.com/forum/information-on-new-gmat-esr-report-beta-221111.html
http://gmatclub.com/forum/list-of-one-year-full-time-mba-programs-222103.html

Re: How much precipitation does Springfield need this month to attain its &nbs [#permalink] 23 Jan 2016, 01:28
Display posts from previous: Sort by