Rata rata bert badan 50 org adlh 50 kg ,setelh ditambah berat badan 5 org menjadi 52 kg ,brapa rata2 berat badan 5 oran trsbt ?

misal rata2 berat badan 5 org = a

52 = (50 × 50) + (5 × a) / (50 + 5)
52 = 2500 + 5a / 55
52 × 55 = 2500 + 5a
2860 = 2500 + 5a
2860 - 2500 = 5a
a = 360 ÷ 5
a = 72

jadi rata2nya = 72 kg