Question

which of the following pairs of sets are disjoint 9 th maths

a) A={f,i,a,s}and B={a,n,f,h,s}

b)C={x:x is a prime number ,x,>2}
and D={x:x is a multiple of 3,×<30}​

Answer 1

Answer:

(i) A = {f, i, a, s} B = {a, n, f, h, s} A ∩ B = {f, i, a, s} ∩ {a, n,f h, s} = {f, a, s} Since A ∩ B ≠ ϕ , A and B are overlapping sets.

(ii) C = {3, 5, 7, 11, ...} D = {2} C ∩ D = {3, 5, 7, 11, ... } ∩ {2} = { } Since C ∩ D = Ø, C and D are disjoint sets.