Question

If n(A intersection 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_______​

Answer 1

Answer:

5

Step-by-step explanation:

this is the correct answer for your question

Answer 2

Answer:

8

Step-by-step explanation:

n(A ∩ B) = 9

Number of elements common in A×B and B×A is k

then, k = 2^9

= 512

= 5+1+2

= 8

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