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UPSC Civil Services 2018 Prelims General Studies Paper II

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Question : 57

Total: 80

A bookseller sold 'a' number of Geography textbooks at the rate of ₹x per book, a+2 ' number of History textbooks at the rate of ₹(x+2) per book and a−2 number of mathematics textbooks at the rate of ₹(x−2) per book. What is his total sale in ₹?

3x+3a
3ax+8
9ax
x3a3

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