October 2018 2 39 Report
1. nilai rata-rata ulangan matematika 27 siswa adlah 65. ada 3 siswa ikut ulangan susulan sehingga nilai rata2nya skarang 62. berapa nilai rata2 3 siswa yg ikut ulangan susulan??

2. Nilai rata2 dari 7 bilangan adalah 65. Nilai rata2 13 bilangan lain adalh 72. Brapanilai rata2 dari 20 blangan tersebutt??
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