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  • The bookshop of a particular school has 10 dozen chemistry books, 8 dozen physics books, 10 dozen economics books. Their selling prices are R 80, Rs 60 and Rs 40 each respectively. Find the total amount the bookshop will receive from selling all the books

Q20.     The bookshop of a particular school has 10 dozen chemistry books, 8 dozen physics books, 10 dozen economics books. Their selling prices are Rs 80, Rs 60 and Rs 40 each respectively. Find the total amount the bookshop will receive from selling all the books using matrix algebra.

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The bookshop has 10 dozen chemistry books, 8 dozen physics books, 10 dozen economics books.

Their selling prices are Rs 80, Rs 60 and Rs 40 each respectively.

The total amount the bookshop will receive from selling all the books:

12\begin{bmatrix}10 &8&10 \end{bmatrix} \begin{bmatrix}80\\60\\40 \end{bmatrix}

=12(10\times 80+8\times 60+10\times 40)

= 12(800+480+ 400)

= 12(1680)

=20160

The total amount the bookshop will receive from selling all the books is 20160.

 

 

 

 

Posted by

seema garhwal

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