Jawaban:

15

Penjelasan dengan langkah-langkah:

S = { 1,2,3,4,5,6,7,8,9 }

A = { 2,4,6,8 }

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

B = { 2,3,5,7 }

B = { 1,4,6,8,9 }

A u B = { 1,3,4,5,6,7,8,9 }

m = 6

n = 9

m + n = 6 + 9 = 15