Math, asked by dragonrohit, 6 months ago

21. If n(A n B) = 9, then the number of elements common to each of the sets A x B and B x A is k. the
sum of the digits in k is

Answers

Answered by wwwshrishailpujari

0

Answer:

A n B=9

A=3

B=3

A×B=3×3=9

B× A=3×3=9

k=3

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