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vivek.kapoor83
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Source: Beat The GMAT — Problem Solving |
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)
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)
What if here you were asked to find the fraction of how many people buy only product Q.
Then it would be E, right?
Then it would be E, right?
Yes.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?
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
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
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
