October 2018 2 23 Report
Dalam suatu kelas terdapat 12 siswa laki² dan 8 siswa perempuan.rata rata umur siswa laki² 12 thn dan umur siswa perempuan 13thn.berapakah rata rata umur siswa di dalam kelas tersebut??

tolong buat caranya
tolong bantu jawab ya
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