Question
Ratio of number of book to number of pen sold by a
shopkeeper is 28:15, respectively while ratio of number of pen to number of pencil sold by the same shopkeeper is 5:16, respectively. If price of each book, each pen and each pencil is Rs. 40, Rs. 20, and Rs. 10 respectively then revenue generated by shopkeeper is Rs. 20900. Find the number of pen sold by shopkeeper. MTSolution
Let, number of book and number of pen sold by shopkeeper be 28x and 15x respectively. Number of pencil sold by shopkeeper = 16/5 times; 15x = 48x So, 28x times; 40 + 15x times; 20 + 48x times; 10 = 20900 rArr; 1120x + 300x + 480x = 20900 rArr; 1900x = 20900 x = 11 Number of pen sold by shopkeeper = 15x = 165
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