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. $\begin{bmatrix}540 \\ 260\end{bmatrix}$
• B. $\begin{bmatrix}250 & 540\end{bmatrix}$
• C. $\begin{bmatrix}540 & 260\end{bmatrix}$
• D. $\begin{bmatrix}260 \\ 540\end{bmatrix}$

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