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Verified answer
Nilai rata2 total = 40 x 70 = 2800dikurangi 190 = 2800 - 190 = 2610
rata2 36 siswa = 2610/36 = 72,5
jjumlah nilai = 40 x 70 = 2800
siswa td dimasukkan nilai = 100+ 3x30
= 100+90
= 190
jumlah nilai akhir = 2800-190=2610
jumlah siswa akhir = 40-4 = 36
rata2 akhir = 2610/36 =72,5
jadi nilai rata skg = 72,5
semoga bantu yaaa