- A300
- B200
- C450
- D400
Step-by-Step Solution
The ratio 4:3:2 has 9 parts; each part = 900 / 9 = 100, so Physics = .
Answer: D) 400
A library has 900 books distributed among Physics, Chemistry and Mathematics in the ratio 4:3:2. Of the Physics books, 25% are reference books; of the Chemistry books, one-third are reference books; of the Mathematics books, 50% are reference books. How many Physics books are there?
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