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(240+32):44.......
272:44.......
6,18
b. jmlah nilai 4 siswa = 8 x 4 = 32
c. jika digabungkan, maka :
(jumlah nilai a + jumlah nilai b) / (40 siswa + 4 siswa)
= (240 + 32) / 44
= 272/44
= 6,18
jadi, nilai rata-ratanya 6,18