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Verified answer
Jumlah siswa = 40rata2 = 62
jumlah nilai = rata2 * jumlah siswa
=40 * 62
=2480
jika satu siswa dng nilai 23 tidak dimasukkan
2480 - 23 =2457 / 39 = 63
jadi rata ujian berubah menjadi 63
semoga bantu yaaaa