DSE 2006 Q54-57 .. (pls discuss)

[maahi]

54>
 INTERSECTION OF TWO GANGS  IS NECESSARILY ?
A) FAMILY = NOT TRUE
B) GANGS = INDEED
C) NOT A FAMILY = WHY NOT ?
D ) NOT A GANG = WHY NOT ?


55>
UNION OF GANGS IS NECESSARILY ?
A)NOT A FAMILY = FALSE
B)NOT A GANG = WHY NOT ?
C) FAMILY = FALSE
 D ) GANG = TRUE


56>
 A) A SET CAN’T BE A GANG AND A FAMILY : INDEED FALSE
B) THERE ARE AT LEAST TWO SETS OF INDI WHO ARE BOTH A GANG AND A FAMILY .  : SOCIETY AND D EMPTY SET ?
C) D UNION OF A FAMILY AND A GANG IS A GANG : FALSE
D ) D INTERSECTION OF A FAMILY AND A GANG IS A FAMILY  : WHY NOT ?


57 > SUPPOSE WE ARE GIVEN A FAMILY AND A GANG . THEN , THE SET OF INDI WHO BELONG TO A GIVEN FAMILY BUT NOT TO D GIVEN GANG NECESSARILY CONSTITUTE
A) A FAMILY  : INDEED FROM D DEFN BUT ITS D EMPTY SET ONLY SO DOESN’T THAT IMPLY NO MEMBERS FROM SET FAMILY AND NONE FROM GANG ???

[duck]

Hi Maahi.. :)

Please refer the following link:
http://discussion-forum.2150183.n2.nabble.com/DSE-2011-Queries-td7580646.html#a7580653