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F = 15
B = 23
bukan F dan B = 6
Yang suka futsal, berenang, dan keduanya:
35 - 6 = 29
F irisan B :
= (15 + 23) - 29
= 38 - 29
= 9
F saja = 15 - 9 = 6 siswa
B saja = 23 - 9 = 14 siswa