Question

A bookseller sold ${}^{\prime }{a}^{\prime }$ number of Geography textbooks at the rate of $Rsx$ per book, ${}^{\prime }a+2^{\prime }$ number of History textbooks at the rate of $Rs(x+2)$ per book and ${}^{\prime }a-2^{\prime }$ number of Mathematics textbooks at the rate of $Rs(x-2)$ per book. What is his total sale in $Rs?$

• A. $3x+3a$
• B. $3ax+8$
• C. $9ax$
• D. $x^3{a}^3$

Answer 1

The correct option is A $3x+3a$

Total sale = ax + (a+2 ) (x+2) +( a -2) (x -2)

= (ax) + ax + 2a + 2x + 4 + ax - 2a - 2x + 4

$\Rightarrow$ 3ax + 8 Rs