1.

1). 10%2). 15%3). 20%4). 25%

Answer»

No. of BOOKS in German = 22500

No. of books in Japanese = (100 – 82)% of 22500 = 0.18 × 22500 = 4050

No. of journals in Russian = 240

No. of journals in Japanese = (100 + 65)% of 240 = 1.65 × 240 = 396

No. of THESIS in other languages = 10

No. of thesis in Japanese = 40% of 10 = 4

Hence, total collection in Japanese = 4050 + 396 + 4 = 4450

Total collection in other languages = 20320 + 1920 + 10 = 22250

∴ Required percentage = (4450/22250) × 100 = 20%


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