October 2018 1 47 Report
Banyak siswa kelas IX ada 36 orang. pada saat ulangan matematika nilai rata - rata siswa perempuan 70, sedangkan nilai rata - rata siswa laki - laki 61. jika nilai rata -rata siswa di kelas itu 63, banyak siswa perempuan adalah....

A. 8 orang
B. 10 orang
C. 16 orang
D. 28 orang
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