1.

1). 4 ∶ 32). 15 ∶ 113). 18 ∶ 134). 22 ∶ 17

Answer»

Total books in SPANISH = 8100

Sum of ratios = 4 + 3 + 2 = 9

No. of medical books in Spanish = (3/9) × 8100 = 2700

No. of other books in Spanish = (2/9) × 8100 = 1800

Total books in French = 33600

Sum of ratios = 7 + 5 + 4 = 16

No. of medical books in French = (5/16) × 33600 = 10500

No. of other books in French = (4/16) × 33600 = 8400

Hence,

Total medical books in both languages = 2700 + 10500 = 13200

Total other books in both languages = 1800 + 8400 = 10200

∴ Required ratio = 13200 ? 10200 = 22 ? 17



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