|T O P I C R E V I E W
||Posted - 01/09/2009 : 19:25:17
Help...can this problem from The Official SAT Study Guide be solved with a Venn diagram?
Set X has x members and set Y has y members. Set Z consists of all members that are in either set X or set Y with the exception of the k common members (k >0). Which of the following represents the number of members in set Z? Why is the answer x + y - 2k and not x + y -k?
|2 L A T E S T R E P L I E S (Newest First)
||Posted - 01/10/2009 : 07:23:23
Thank you Ultraglide...can't believe I didn't see it.
||Posted - 01/09/2009 : 22:48:56
When you combine X and Y, the common members are counted twice - once in X and once in Y.