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=100%-80%=20%
20%=4
30%=?
30×4=20×?
120 = 20×?
120÷20=6 orang
15% + 10% + 30% + 25% = 80%
merah = 100% - 80% = 20%
cari siswa keseluruhan dengan diketahuinya jumlah si merah.
100/20 × 4 = 20 anak.
kemudian cari jumlah si hijau
30% × 20 = 30/100 × 20 = 6
jawaban A
semoga membantumu ^^