Question
In the stationery shop, 13 of the books sold were Chinese books. 12 of the remaining books sold were Science books. The ratio of the number of Science books sold to the number of Math books was 9 : 5. The number of English books sold was 20. How many books were sold altogether?
4 m

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In the stationery shop, 13 of the books sold were Chinese books. 12 of the remaining books sold were Science books. The ratio of the number of Science books sold to the number of Math books was 9 : 5. The number of English books sold was 20. How many books were sold altogether?