jellyj4

[nuthan]

bowls X and Y each contained excatly 2 jelly beans ,each of which was either red or black.one of the jelly beans in bowl X was exchanged with one of the jelly beans in bowl Y.After the exchange ,were both of the jelly beans in bowl X black?

1) before the exchange ,bowl X contained 2 black jelly beans.

2)after the exchange ,bowl Y contained 1 jelly bean of each color

SPOILER: Official Answer is e

[arjmen]

I reckon E

I: Doesn't tell us much. Insuff
II: Again Insuff

I&II:
Scenario 1) Before: Y --> 2 R, X--> 2 B. After: Y -->R-B, X--> R-B
Scenario 2) Before: Y --> R-B, X--> 2 B. After: Y -->R-B, X--> 2 B [they exchange Black pieces]
Insuff

[scoot]

Arj,

Is not it ans C.

the stem says that each of which was either red or black and as per opt2, after the exchange ,bowl Y contained 1 jelly bean of each color . So if y as 1-r and 1 B. X should have 1R and 1 B. Am I right?

[arjmen]

the stem says that each of which was either red or black and as per opt2, after the exchange ,bowl Y contained 1 jelly bean of each color . So if y as 1-r and 1 B. X should have 1R and 1 B. Am I right?

The stem only says that a jelly bean can be either red or black (no other colours). This does not mean that there has to be equal representation I reckon.
I could be wrong though.

[rd_eastbay]

Agreed.

[rd_eastbay]

Arj - your reading of the stem is correct.

[jax510]

If X=The GRE Big Book and Y=rb then after exchange we can have either X=rb and Y=The GRE Big Book Princeton Review X=The GRE Big Book and Y=rb. Based on stmt(2) the later is true. But if X=The GRE Big Book and Y=rr then after the exchange Y=X=rb. Therefore, two solutions are possible for the exchange.

Agree with Official Guide, answer is (e)