Question

Suppose Meera and Nadeem are two friends. Meera wants to buy 2 pens and 5 story books, while Nadeem needs 8 pens and 10 story books. They both go to a shop to enquire about the rates.
Pen : ₹ 5 each, story book : ₹ 50 each. Then, the money required by each to make purchases in terms of matrix representation is

• A. $\left[\begin{array}{c}540\\ 260\end{array}\right]$
• B. $\left[\begin{array}{cc}250& 540\end{array}\right]$
• C. $\left[\begin{array}{cc}540& 260\end{array}\right]$
• D. $\left[\begin{array}{c}260\\ 540\end{array}\right]$

Answer 1

Answer: (D)

Suppose Meera and Nadeem are two friends. Meera wants to buy 2 pens and 5 story books, while Nadeem needs 8 pens and 10 story books. They both go to a shop to enquire about the rates which are quoted as follows
Pen$-₹5$ each, story book$-₹50$ each
Clearly, Meera needs $₹(5\times 2+50\times 5)$ that is $₹260$, while Nadeern needs $(8\times 5+50\times 10)₹$, that is $₹540$. In terms of matrix representation, we can write the above information as follows