Question

if A=1 2 3 and B=4 5 6 then find n(A×B)​

Answer 1

Answer:

n(A) =3

n(B)=3

n(A×B)=n(A)×n(B)

=3×3=9

Answer 2

Answer:

(i)A×(B∩C)

∩  Intersection:common between two sets

B∩C={3,4}∩{4,5,6}={4}

A×(B∩C)=

{1,2,3}×{4}

={(1,4),(2,4),(3,4)}

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