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

 It is currently 22 Jun 2018, 21:19

### 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

# Last year, an appliance store sold an average (arithmetic mean) of 42

Author Message
TAGS:

### Hide Tags

SVP
Status: Preparing for the GMAT
Joined: 02 Nov 2016
Posts: 1544
Location: Pakistan
GPA: 3.39
Last year, an appliance store sold an average (arithmetic mean) of 42 [#permalink]

### Show Tags

23 Feb 2017, 06:17
2
00:00

Difficulty:

5% (low)

Question Stats:

86% (01:11) correct 14% (01:31) wrong based on 57 sessions

### HideShow timer Statistics

Last year, an appliance store sold an average (arithmetic mean) of 42 microwave ovens per month. In the first 10 months of this year, the store has sold an average (arithmetic mean) of only 20 microwaves per month. What was the average number of microwaves sold per month during the entire 22- month period?

(A) 21
(B) 30
(C) 31
(D) 32
(E) 44

_________________

Official PS Practice Questions
Press +1 Kudos if this post is helpful

Board of Directors
Status: QA & VA Forum Moderator
Joined: 11 Jun 2011
Posts: 3511
Location: India
GPA: 3.5
Re: Last year, an appliance store sold an average (arithmetic mean) of 42 [#permalink]

### Show Tags

23 Feb 2017, 09:04
1
Last year, an appliance store sold an average (arithmetic mean) of 42 microwave ovens per month. In the first 10 months of this year, the store has sold an average (arithmetic mean) of only 20 microwaves per month. What was the average number of microwaves sold per month during the entire 22- month period?

(A) 21
(B) 30
(C) 31
(D) 32
(E) 44

Total number of microwaves ovens sold in last 12 months = 42*12 = 504
Total number of microwaves ovens sold in last 10 months = 20*10 = 200

Total number of microwaves ovens sold in last 22 months = 504 + 200 => 704

Thus, average number of microwaves ovens sold in last 22 months = 704/22 => 32

Thus, correct answer must be (D) 32...
_________________

Thanks and Regards

Abhishek....

PLEASE FOLLOW THE RULES FOR POSTING IN QA AND VA FORUM AND USE SEARCH FUNCTION BEFORE POSTING NEW QUESTIONS

How to use Search Function in GMAT Club | Rules for Posting in QA forum | Writing Mathematical Formulas |Rules for Posting in VA forum | Request Expert's Reply ( VA Forum Only )

Target Test Prep Representative
Affiliations: Target Test Prep
Joined: 04 Mar 2011
Posts: 2570
Re: Last year, an appliance store sold an average (arithmetic mean) of 42 [#permalink]

### Show Tags

27 Feb 2017, 11:49
Last year, an appliance store sold an average (arithmetic mean) of 42 microwave ovens per month. In the first 10 months of this year, the store has sold an average (arithmetic mean) of only 20 microwaves per month. What was the average number of microwaves sold per month during the entire 22- month period?

(A) 21
(B) 30
(C) 31
(D) 32
(E) 44

We are given that an appliance store sold an average (arithmetic mean) of 42 microwave ovens per month and that in the first 10 months of this year, the store has sold an average (arithmetic mean) of only 20 microwaves per month.

42 x 12 = 504 microwaves were sold over the course of last year.

10 x 20 = 200 microwaves were sold in the first 10 months of this year.

Thus, the average number of microwaves sold for the 22-month period was:

(504 + 200)/22 = 704/22 = 32

_________________

Jeffery Miller

GMAT Quant Self-Study Course
500+ lessons 3000+ practice problems 800+ HD solutions

Manager
Joined: 19 Jul 2017
Posts: 85
Location: India
Concentration: General Management, Strategy
GPA: 3.5
Re: Last year, an appliance store sold an average (arithmetic mean) of 42 [#permalink]

### Show Tags

13 Sep 2017, 08:40
Last year, an appliance store sold an average (arithmetic mean) of 42 microwave ovens per month. In the first 10 months of this year, the store has sold an average (arithmetic mean) of only 20 microwaves per month. What was the average number of microwaves sold per month during the entire 22- month period?

(A) 21
(B) 30
(C) 31
(D) 32
(E) 44

Average during 22 months = 42*12+10*20/22 = 252+100/11 = 352/11 =32

Ans:D
Re: Last year, an appliance store sold an average (arithmetic mean) of 42   [#permalink] 13 Sep 2017, 08:40
Display posts from previous: Sort by