jwb
jumlah ank laki = x
5 ank laki berat badan = 5 x 60
= 300kg
ank perempuan = 15 x 40
= 600kg
seluruh berat ank = 300 + 600
= 900kg
seluruh anak = 5 + 15
= 20 anak
rata" berat badan = 900 : 20
= 45kg
rata" berat badan seluruhny = 45kg
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jwb
jumlah ank laki = x
5 ank laki berat badan = 5 x 60
= 300kg
ank perempuan = 15 x 40
= 600kg
seluruh berat ank = 300 + 600
= 900kg
seluruh anak = 5 + 15
= 20 anak
rata" berat badan = 900 : 20
= 45kg
rata" berat badan seluruhny = 45kg