Question

Which of the following sets are pairs of disjoint sets? Justify yours answer :
(i) `A = {3,4,5,6} and B={2,5,7,9}`
(ii)` C={1,2,3,4,5} and D={6,7,9}`
(iii) ` E={x:x in N, ix "is even and" x lt 8}`
` F={x:x =3n,n in N and n lt 4}`
(iv) `G={x:x in N,x " is even"} and H ={x:x in N, x " is a prime" }`
(v) `J={x:x in N,x " is a even} and K={x:x in N, x "is odd"}`

Answer 1

Correct Answer - (ii) C and D , since `C cap D = phi `
(iv) J and K, Since `J cap K=phi`.