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# m03#7

Author Message
Intern
Joined: 09 Jun 2010
Posts: 24
Followers: 0

Kudos [?]: 19 [0], given: 6

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13 Jul 2011, 08:26
Foodmart customers regularly buy at least one of the following products: milk, chicken, or apples. 60% of shoppers buy milk, 50% buy chicken, and 35% buy apples. If 10% of the customers buy all 3 products, what percentage of Foodmart customers purchase exactly 2 of the products listed above?

5%
10%
15%
25%
30%

I don't agree with the OA. Shouldn't the formula be M+C+A - (M&C + M&A + C&A) + M&C&A = 100%?
Senior Manager
Joined: 24 Mar 2011
Posts: 457
Location: Texas
Followers: 5

Kudos [?]: 164 [0], given: 20

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13 Jul 2011, 09:15
DYNAMITE wrote:
I don't agree with the OA. Shouldn't the formula be M+C+A - (M&C + M&A + C&A) + M&C&A = 100%?

it should be M+C+A - 3(M&C&A) - (M&C + M&A + C&A) + M&C&A = 100%

so 25%

D.

if you draw a venn diagram & try, it will be easier to understand.
Intern
Joined: 09 Jun 2010
Posts: 24
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Kudos [?]: 19 [0], given: 6

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13 Jul 2011, 10:16
I've drawn a VENN diagram. Subtracting the M&C away (the 2-part) take away the M&C&A portion (the 3-part) which was added 3 parts. Then we add it back once.
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Joined: 29 Aug 2011
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17 Sep 2011, 16:47
In the formula for "explained answers," I cannot figure why "T" is multiplied by (3-1). Can someone shed light on this?
Re: m03#7   [#permalink] 17 Sep 2011, 16:47
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# m03#7

Moderator: Bunuel

 Powered by phpBB © phpBB Group and phpBB SEO Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.
The text passage provided is a discussion about a math problem from a GMAT practice test. The problem involves calculating the percentage of customers who purchase exactly two out of three products (milk, chicken, or apples) given the percentages of customers who buy each product and the percentage who buy all three.

The content structure is as follows:
- The problem statement is given, including the percentages of customers buying each product and the percentage buying all three.
- A user (DYNAMITE) disagrees with the provided answer and suggests a formula for solving the problem.
- Another user (agdimple333) provides a corrected formula and the correct answer.
- DYNAMITE responds with an explanation of the Venn diagram approach.
- A new user (mikee30) asks for clarification on a part of the formula.

Analysis:
single_question_with_answer

the passage contains a single mathematical question and an answer is provided in the discussion.
Given a text passage, determine:
    1. If it contains a mathematical question (including word problems or calculations)
    2. If an answer to that mathematical question is provided in the text

First, describe the content structure you found in 1-2 sentences.

Then provide your analysis in the following format:
TYPE: <one of the following values>
- NO_QUESTION
- SINGLE_QUESTION
- SINGLE_QUESTION_WITH_ANSWER
- MULTIPLE_QUESTIONS
- MULTIPLE_QUESTIONS_WITH_ANSWERS
system
m03#7 : Retired Discussions [Locked]
Check GMAT Club Decision Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

 It is currently 16 Jan 2017, 08:43

# Jan 16th:

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# m03#7

Author Message
Intern
Joined: 09 Jun 2010
Posts: 24
Followers: 0

Kudos [?]: 19 [0], given: 6

### Show Tags

13 Jul 2011, 08:26
Foodmart customers regularly buy at least one of the following products: milk, chicken, or apples. 60% of shoppers buy milk, 50% buy chicken, and 35% buy apples. If 10% of the customers buy all 3 products, what percentage of Foodmart customers purchase exactly 2 of the products listed above?

5%
10%
15%
25%
30%

I don't agree with the OA. Shouldn't the formula be M+C+A - (M&C + M&A + C&A) + M&C&A = 100%?
Senior Manager
Joined: 24 Mar 2011
Posts: 457
Location: Texas
Followers: 5

Kudos [?]: 164 [0], given: 20

### Show Tags

13 Jul 2011, 09:15
DYNAMITE wrote:
I don't agree with the OA. Shouldn't the formula be M+C+A - (M&C + M&A + C&A) + M&C&A = 100%?

it should be M+C+A - 3(M&C&A) - (M&C + M&A + C&A) + M&C&A = 100%

so 25%

D.

if you draw a venn diagram & try, it will be easier to understand.
Intern
Joined: 09 Jun 2010
Posts: 24
Followers: 0

Kudos [?]: 19 [0], given: 6

### Show Tags

13 Jul 2011, 10:16
I've drawn a VENN diagram. Subtracting the M&C away (the 2-part) take away the M&C&A portion (the 3-part) which was added 3 parts. Then we add it back once.
Intern
Joined: 29 Aug 2011
Posts: 3
Followers: 0

Kudos [?]: 0 [0], given: 3

### Show Tags

17 Sep 2011, 16:47
In the formula for "explained answers," I cannot figure why "T" is multiplied by (3-1). Can someone shed light on this?
Re: m03#7   [#permalink] 17 Sep 2011, 16:47
Display posts from previous: Sort by

# m03#7

Moderator: Bunuel

 Powered by phpBB © phpBB Group and phpBB SEO Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.
user
The text passage provided is a discussion about a math problem from a GMAT practice test. The problem involves calculating the percentage of customers who purchase exactly two out of three products (milk, chicken, or apples) given the percentages of customers who buy each product and the percentage who buy all three.

The content structure is as follows:
- The problem statement is given, including the percentages of customers buying each product and the percentage buying all three.
- A user (DYNAMITE) disagrees with the provided answer and suggests a formula for solving the problem.
- Another user (agdimple333) provides a corrected formula and the correct answer.
- DYNAMITE responds with an explanation of the Venn diagram approach.
- A new user (mikee30) asks for clarification on a part of the formula.

Analysis:
TYPE: SINGLE_QUESTION_WITH_ANSWER

The passage contains a single mathematical question and an answer is provided in the discussion.