- A300
- B350
- C270
- D250
Step-by-Step Solution
Physics ref = 25% of 400 = 100; Chemistry ref = 100; Mathematics ref = 50% of 200 = 100; total = 300.
Answer: A) 300
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. What is the total number of reference books in the library?
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