September 2018 2 49 Report
Rata-rata nilai ujian 12 siswa adalah 65.4. Jika digabungkan dengan 10 siswa yang mempunyai rata-rata 71.0. Maka rata-rata nilai ujian seluruh siswa adalah...
a. 62.4
b. 67.9
c. 71.0
d. 71.2
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