1.

ꜰɪɴᴅ ᴛʜᴇ ɴᴜᴍʙᴇʀ ᴏꜰ ꜱᴜʙꜱᴇᴛꜱ ᴏꜰ ᴀ×ʙ ᴡʜᴇʀᴇ ᴀ ={3,6,9} ᴀɴᴅ ʙ={x,ʏ,ᴢ}

Answer» No of relation=3×3=9,and no of subsets of A×B is 9^2=81


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