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1900 - 45 - 55 = 1800
Rata-rata = 1800 : 48 = 37,5
45 kg + 55 kg = 100 kg
1900-100=1800
50 orang - 2 orang = 48 orang
1800 : 48 = 37,5
Jadi jawabammya 37,5