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29 Aug 2006, 09:20
Kudos
Bookmarks
I got lost in the wording – what do they want in this one?
In the equation b = ka+3, k is a constant. If the possible solutions are in the form (a,b); is (2,3) a solution to the equation?
(1) (1,4) is a solution to the equation: b = ka + 2
(2) (5,3) is a solution to the equation: 3b = ka – 1
A. St. 1 is sufficient
B. St. 2 is sufficient
C....
D...
E....
In the equation b = ka+3, k is a constant. If the possible solutions are in the form (a,b); is (2,3) a solution to the equation?
(1) (1,4) is a solution to the equation: b = ka + 2
(2) (5,3) is a solution to the equation: 3b = ka – 1
A. St. 1 is sufficient
B. St. 2 is sufficient
C....
D...
E....
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29 Aug 2006, 09:30
Kudos
Bookmarks
saumster
In the equation b = ka+3, k is a constant. If the possible solutions are in the form (a,b); is (2,3) lets try to paraphrase this one
In simple words it means that
if a=2 and b=3 is the
b = ka+3 equation correct
1 st) 4=1k+2---k=2
suff
2 statement
9=5k-1
k=2
suff
(2,3) are not possible solutions
Hence D
29 Aug 2006, 09:37
Kudos
Bookmarks
I agree with (D)
Two things to watch out for:
- My biggest bogeyman - that the answer to a DS can be NO and still be sufficient!
When you solve for k with the given values, you get k = 0.
Both (a) and (b) give you equations which will give you k values since a and b values are specified.
Therefore regardless of WHAT those values are, you can answer the question!
- The second thing to watch out for when you have two equations in two variables are to make sure they are not saying exactly the same thing, i.e. they are not the same equation. However, in this case even that wont dampen the issue, since the answer will still be D - either is sufficient.
MG
Two things to watch out for:
- My biggest bogeyman - that the answer to a DS can be NO and still be sufficient!
When you solve for k with the given values, you get k = 0.
Both (a) and (b) give you equations which will give you k values since a and b values are specified.
Therefore regardless of WHAT those values are, you can answer the question!
- The second thing to watch out for when you have two equations in two variables are to make sure they are not saying exactly the same thing, i.e. they are not the same equation. However, in this case even that wont dampen the issue, since the answer will still be D - either is sufficient.
MG
