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cara= FPB dari 60,120,150 ketemu
= 2 x 3 x 5 = 30
b. banyaknya anak
• total 330 org : 30 kelompok
= 11 org dalam 1 kelompok
• 150 : 30 = 5 org (13-15th)
• 120 : 30 = 4 org (10-12th)
• 60 : 30 = 2 org (7-9th)
cek = 5+4+2=11 org