Rata-rata nilai 20 siswa kelas 9A adalah 68. Jika nilai Andi dan Budi dikeluarkan, rata-rata nilai siswa kelas 9A menjadi 67. Jika nilai andi 80, nilai budi berapa?
RaisaHussein26
67 =20×68-80-x 20-2 67 = 1360-80-x 18 67×18 = 1280-x 1206 = 1280-x x = 1280-1206 x = 74 jadi nilai budi 74
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fuadrivai67 =20×68-80-x 20-2 67 = 1360-80-x 18 67×18 = 1280-x 1206 = 1280-x x = 1280-1206 x = 74
20-2
67 = 1360-80-x
18
67×18 = 1280-x
1206 = 1280-x
x = 1280-1206
x = 74
jadi nilai budi 74
20-2
67 = 1360-80-x
18
67×18 = 1280-x
1206 = 1280-x
x = 1280-1206
x = 74