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Grade 12th passAlgebra

if set A ={1,2,3,4,5} and B={2,3,6,7} then the no of common elements on (A×B) and (B×A) and theoptions are a)18b)6 c)4d)0 explain it briefly

Question image for if set A ={1,2,3,4,5} and B={2,3,6,7} then the no
Profile image of Mehdi Alam
8 Years agoGrade 12th pass
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1 Answer

Profile image of Arun
8 Years ago
Dear student
 
A x B = {(1,2)(1,3)(1,6)(1,7)……………(5,7)}
 
B x A = {(2,1)(2,2)(2,3)…………(7,5)}
 
Now AxB intersection BxA = {(2,2)(2,3)(3,2)(3,3)}
Number of elements = 4

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