Question

please tell me what is answer ( click on the pic) ​

Answer 1

Answer:

Ans =1,3,5,7,9.

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Answer 2

Given

A={2,3,5,7}

B={1,3,5,7,9}

Solution

B-A= {1,3,5,7,9} - {2,3,5,7}

= {1,9}

B-A = {1,9}