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 ₹?
A
3x + 3a
B
3ax + 8
C
9ax
D
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