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by vivek.kapoor83 » Sun Dec 28, 2008 12:13 pm
any take on this ?
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Re: gmatprep7

by Sachindh » Sun Dec 28, 2008 8:48 pm
vivek.kapoor83 wrote:fsdf
I think answer should be C.
What is OA?
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by cramya » Sun Dec 28, 2008 9:03 pm
I agree with C)

We can draw a grid or use the actual formula.

I will try to use the formula

Since we are aksed for a fraction and not an actual number lets take the toal to be 1 (since we are working wiht fractions)

Total = Group1 exclusive + Group2 exclusive + both + neither (1)

(Note this formula is not the same as

Total = group1 + group2 - both + neither (2)

group1 = Group1 exclusive + both
group2 = Group2 exclusive + both

Thus from (2) I can get to (1) - Use the different variations based on what given in the problem


Coming to the problem:

Stmt I

Group I exclusive = 1/3

Still Group2 exclusive + both missing

INSUFF

Stmt II

Group2 exclusive + both = 1/2


INSUFF

Group I exclusive missing


Stmt I and II toegther

Total = Group1 exclusive + (Group2 exclusive + both) + neither
1 = 1/3 + (1/2) + neither

neither = 1 - 1/3-1/2
= 1/6

SUFFICIENT since we just need to find the fraction

Choose C)
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by vittalgmat » Sun Dec 28, 2008 10:21 pm
Thanks Cramya,

This was very helpful
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by rajataga » Sun Dec 28, 2008 10:40 pm
What if here you were asked to find the fraction of how many people buy only product Q.

Then it would be E, right?
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by Sachindh » Sun Dec 28, 2008 10:51 pm
rajataga wrote:What if here you were asked to find the fraction of how many people buy only product Q.

Then it would be E, right?
Yes.
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by vivek.kapoor83 » Mon Dec 29, 2008 1:44 am
cramya wrote:I agree with C)

We can draw a grid or use the actual formula.

I will try to use the formula

Since we are aksed for a fraction and not an actual number lets take the toal to be 1 (since we are working wiht fractions)

Total = Group1 exclusive + Group2 exclusive + both + neither (1)

(Note this formula is not the same as

Total = group1 + group2 - both + neither (2)

group1 = Group1 exclusive + both
group2 = Group2 exclusive + both

Thus from (2) I can get to (1) - Use the different variations based on what given in the problem

I tried to solve it by Venn diagram and landed uo markin E....crmaya cn u explain by venn's diagram
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by maihuna » Mon Dec 29, 2008 1:55 am
Venn diagram is not must. See the table below:
1.
Py PN
Qy
QN 1/3

2. Py PN
Qy 1/2
QN 1/2

one has to find PnQn

if u combine 1 and 2
PnQn = 1/2-1/3 = 1/6

very easy???? C rocks
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by maihuna » Mon Dec 29, 2008 1:57 am
humm i cannt show the table ... it got mingled..
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