1.

A, B, C and D are four sets such that `AnnB=CnnD=phi`. Consider the following : 1. `AuuC` and `BuuD` are always disjoint. 2. `AnnC and BnnD` are always disjoint Which of the above statements is/are correct ?A. 1 onlyB. 2 onlyC. Both 1 and 2D. Neither 1 nor 2

Answer» Correct Answer - B
Let A={1,2}
B={3,4,0}
C={5,6,0}
D={7,8}
Such that `(AnnB)=(CnnD)=phi`
`implies(AuuC)={1,2,5,6,0}`
`implies(BuuD)={3,4,7,8,0}`
`implies(AuuC)nn(BuuD)={0}`
`"So "(AuuC) and (BuuD)` are not always dispoint
`implies (AnnC) and phi and (BnnD)=phi`
`"So "(AnnC) and (BnnD)` are always disjoint.


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