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Solution


Q.

If A={a,b,c}, B={b,c,d} and C={a,d,c}, then (A-B)×(B∩C)=
1 {(a,c),(a,d)}  
2 {(a,b),(c,d)}  
3 {(c,a),(d,a)}  
4 {(a,c),(a,d),(b,d)}  

Ans.

(1)

If A={a,b,c}, B={b,c,d} and C={a,d,c},

A-B={a}, B∩C={c,d}

then  (A-B)×(B∩C)={a}×{c,d}={(a,c),(a,d)}