Question
A shopkeeper sold three types of books i.e. fiction,
non-fiction, and comics. Number of fiction books sold is 25% of the total number of books sold and the ratio of non-fiction to comics sold is 4:3 respectively. If the difference between the number of fiction books sold and the number of comics sold is 90, then find the number of non-fiction books sold.Solution
ATQ, Let the total number of books sold be '100x' Number of fiction books sold = 0.25 Ă— 100x = '25x' Number of comics sold = (3/7) Ă— 75x = (75x Ă— 3)/7 = 225x/7 Given: 
So, the number of non-fiction books sold: 
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