CSATData Interpretation & SufficiencyAlgebra2018

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

Correct Answer: Option B

Explanation

To find the Total Sale, we apply the basic revenue formula (Quantity × Rate) for each of the three categories. This follows the standard 'Weighted Sum' structure seen

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