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Set of 3

by ellexay » Tue Feb 10, 2009 4:13 pm
A group of people participate in some curriculums, 20 of them practice Yoga, 10 study cooking, 12 study weaving, 3 of them study cooking only, 4 of them study both the cooking and yoga, 2 of them participate all curriculums. How many people study both cooking and weaving?

A.1 B.2 C.3 D.4 E.5

Soln: We know there are 10 people who do cooking as an activity.

3 -> people who do only cooking
4 -> do cooking and Yoga
2 -> do all of the activities
x -> number of people doing cooking and weaving

When you sum all this up, we should have 10. So 3+4+2+x=10 --> x=10-9=1

****

I thought the answer was (C).
I did: 10-4-x=3
x=3

Please guide...thank you!!!
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by DeepakR » Tue Feb 10, 2009 5:26 pm
C=3 --> 1
C+Y=4 -->2
C+W+Y=2 -->3

From 1 and 2 Y=1 hence 3 becomes C+W=2-1=1 Ans.) A or using Venn diagram we get, 10=3+4+2+x hence x=1

- Deepak
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by ellexay » Tue Feb 10, 2009 5:35 pm
You simplified this problem very well. Thank you.
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Re: Set of 3

by piyush_nitt » Thu Feb 12, 2009 4:06 am
ellexay wrote:A group of people participate in some curriculums, 20 of them practice Yoga, 10 study cooking, 12 study weaving, 3 of them study cooking only, 4 of them study both the cooking and yoga, 2 of them participate all curriculums. How many people study both cooking and weaving?

A.1 B.2 C.3 D.4 E.5

Soln: We know there are 10 people who do cooking as an activity.

3 -> people who do only cooking
4 -> do cooking and Yoga
2 -> do all of the activities
x -> number of people doing cooking and weaving





When you sum all this up, we should have 10. So 3+4+2+x=10 --> x=10-9=1

****

I thought the answer was (C).
I did: 10-4-x=3
x=3

Please guide...thank you!!!

Guys

Don't you think that answer should be C i.e 3

Statement states that

A group of people participate in some curriculums, 20 of them practice Yoga, 10 study cooking, 12 study weaving, 3 of them study cooking only, 4 of them study both the cooking and yoga, 2 of them participate all curriculums. How many people study both cooking and weaving?

I think if statement read as "both cooking and yoga ONLY" then only we can take C + Y = 4 otherwise

Cooking + Yoga Only = 2 (cooking + yoga - all activities)

therefore explanation given by ellaxy is correct

Please correct me!
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C for me

by alto34 » Thu Feb 12, 2009 5:58 am
Hi,

I totally agree with piyush_nitt. Is the OA really A?

Thanks for the answer
really want to beat the GMAT
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by ellexay » Thu Feb 12, 2009 6:28 am
According to this (unofficial) source, the answer is A. :roll:
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by marcusking » Thu Feb 12, 2009 6:40 am
I got A.1 by doing some Diagrams. I think we have to assume that 4 of them study both the cooking and yoga means exclusively. Otherwise we couldn't discern between those 4 and the two that were taking all 3 courses. We are told 2 of the students participate in all 3 curriculum. We can assume from that that they are also taking Yoga and Cooking and there would be no need to count them again exclusively for just Yoga and Cooking.

Diagramming it should help clarify it for you. It did for me at least
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by x2suresh » Thu Feb 12, 2009 9:05 am
Question is lacking clarity.
Answer would be A.. if we modify the question as below.

A group of people participate in some curriculums, 20 of them practice Yoga, 10 study cooking, 12 study weaving, 3 of them study cooking only, 4 of them study both the cooking and yoga only , 2 of them participate all curriculums. How many people study both cooking and weaving only ?
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by jayasimha » Thu Apr 28, 2011 5:42 am
look plzz its not possiable to take only cooking this what did i guess its not wrong
cooking =c
yoga=4
weeing=w
c=3
c+y=4
c+y+w=2
y=1
c+w=1
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by jayasimha » Thu Apr 28, 2011 5:43 am
look plzz its not possiable to take only cooking this what did i guess this is not wrong
cooking =c
yoga=4
weeving=w
c=3
c+y=4
c+y+w=2
y=1
c+w=1
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by Stuart@KaplanGMAT » Thu Apr 28, 2011 10:50 am
You know that it's going to be a horribly worded question as soon as you see the word "curriculums" in the first sentence (and "participate in some curriculums" is also non-idiomatic, even if "curriculums" was a word).

If you find non-official questions written in nonsensical English, your best bet is to completely ignore them; trying to solve them will often hurt your progress more than help it.
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by MAAJ » Thu Apr 28, 2011 1:35 pm
I believe it's much more easy if you solve with a Ven's Diagram. Took < 1 min with VD
"There's a difference between interest and commitment. When you're interested in doing something, you do it only when circumstance permit. When you're committed to something, you accept no excuses, only results."
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