Jawaanbbbbbbbbbbbbb tolonggggg​

Jawaban:

600 buku

Penjelasan dengan langkah-langkah:

20% = 300

1% = 300/20 = 15

Buku Ipa = 30%

Buku Ips = 10%

30% + 10% = 40%

40 × 15 = 600