simple DS

[chimni]

If carmen had 12 more tapes she would have twice as many tapes as jack
does carmen have fewer tapes than jack

a)jack has more than 5 tapes
b)carmen has fewer than 12 tapes

A dosent tell us anything

I think answer is B
Please confirm and explain
Thanks

[YEHAA]

Say Carmen has x number of tapes and,
Jack has y number of tapes.
We are asked if y>x.
Then, our equation is x+12=2y

(I) If y>5, y>x whatever greater than 5 we take y. Sufficient!
(II) Again, if x<12, y>x whatever less than 12 we take x. Sufficient!

You can try a few values in the equation.

So, I think, the answer is (D).

[SuM]

Say Carmen has x number of tapes and,
Jack has y number of tapes.
We are asked if y>x.
Then, our equation is x+12=2y

(I) If y>5, y>x whatever greater than 5 we take y. Sufficient!
(II) Again, if x<12, y>x whatever less than 12 we take x. Sufficient!

You can try a few values in the equation.

So, I think, the answer is (D).

Now let's try to find out the value of y-x

y-x = y-(12-2y) = y-12
y>5 does not tell you whether or not (y-12) positive. So we can not conclude whether y>x or y<x, right?.

Statement 1 : Insufficient
Statement 2 :
y-x = (x+12)/2 - x = (12-x)/2
for all values of x<12, ((12-x)/2) is positive. - Sufficient

Answer is B

[YEHAA]

Yeah, (II) is NOT sufficient.
If we take y>12, then we need an x which is greater than y.

I think, I shoul take DS problems a bit more seriously

Sorry about my fault...