Interesting DS question
Q) If mv< pv <0 is v>0??
1) m < p
2) m < 0
Could someone plz post an explanation for this?
Thanks
Inequality DS
This topic has expert replies
-
- Master | Next Rank: 500 Posts
- Posts: 107
- Joined: Tue Jun 05, 2012 3:25 am
- Thanked: 1 times
- Followed by:13 members
-
- Senior | Next Rank: 100 Posts
- Posts: 52
- Joined: Mon Aug 13, 2012 11:53 pm
- Location: Mumbai
- Thanked: 1 times
The answer according to me for the above question is D.
According to the question:
mv<pv<0
is V>0 or is V +ve
Now
Statement 1:
m<p
here in the original inequality,
mv<pv<0
this means that mv and pv are -ve
now let us consider the cases:
1. Both m and p are +ve,
then V has to be -ve
however in this case the original inequality will not hold
as mv>pv
so this case is not possible
2. m is -ve and p is +ve
in this case also the original inequality will not hold irrespective of the value of V
Hence this case is also not possible
3. m and p both are -ve
for mv<pv<0
v has to be >0
as m<p, in this case the original inequality stands
Hence statement 1 is sufficient.
Statement 2:
since m<0
and mv<0
V has to be greater that 0
Hence statement 2 is sufficient
Thus the answer is D
According to the question:
mv<pv<0
is V>0 or is V +ve
Now
Statement 1:
m<p
here in the original inequality,
mv<pv<0
this means that mv and pv are -ve
now let us consider the cases:
1. Both m and p are +ve,
then V has to be -ve
however in this case the original inequality will not hold
as mv>pv
so this case is not possible
2. m is -ve and p is +ve
in this case also the original inequality will not hold irrespective of the value of V
Hence this case is also not possible
3. m and p both are -ve
for mv<pv<0
v has to be >0
as m<p, in this case the original inequality stands
Hence statement 1 is sufficient.
Statement 2:
since m<0
and mv<0
V has to be greater that 0
Hence statement 2 is sufficient
Thus the answer is D
-
- Master | Next Rank: 500 Posts
- Posts: 107
- Joined: Tue Jun 05, 2012 3:25 am
- Thanked: 1 times
- Followed by:13 members
- GMAT Kolaveri
- Master | Next Rank: 500 Posts
- Posts: 287
- Joined: Fri Mar 23, 2012 12:33 am
- Location: Pune,India
- Thanked: 60 times
- Followed by:6 members
Analysis of Question Stem:soni_pallavi wrote:Interesting DS question
Q) If mv< pv <0 is v>0??
1) m < p
2) m < 0
V > 0 ?
Yes or No question type.
We need a yes or no for the question whether V lies on the right hand side of zero in the number line?
Statement 1:
m < p
GIVEN: mv< pv <0
if v is -ve , then mv < pv will not be true (when we multiply -ve number we need to flip the signs). v is not negative.
if v is 0, then mv < pv will not be true. v is not Zero.
Hence v is +ve or v > 0. YES
Hence ST 1 is sufficient. BCE can be eliminated.
Statement 2:
Forget everything about statement 1. start fresh with statement 2.
m < 0
GIVEN: mv< pv <0 . m is negative.
if v is -ve, then mv <0 cannot be true. Since the product of two -ve is +ve. v is not negative.
if v is 0, mv < 0 cannot be true. v is not zero.
We have a definite yes for the question is v > 0?
Hence OA: D
Regards and Thanks,
Vinoth@GMAT Kolaveri
https://www.facebook.com/GmatKolaveri
https://gmatkolaveri.tumblr.com/
Click the thank you button if you like my reply
Vinoth@GMAT Kolaveri
https://www.facebook.com/GmatKolaveri
https://gmatkolaveri.tumblr.com/
Click the thank you button if you like my reply