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susu = 20
teh = 15
tek & susu = 5
tidak ada = 3
jadi total siswa = 33
20
voly = 20
sepak bola = 25
bulu tangkis = 23
boly & bola = 8
voly & bulu tangkis = 10
bulu tangkis & bola = 12
ketiganya = 4
tidak ada = 2
jadi total siswa = 47
20.
20+25+23-4-5-6-8+2 = 47