Question

25) Jay and Ram are two friends in a class. Jay
wanted to buy 4 pens and 8 notebooks, Ram
wanted to buy 5 pens and 12 notebooks.
Both of them went to a shop. The price
of a pen and a notebook which they have
selected was Rs.6 and Rs.10. Using Matrix
multiplication, find the amount required
from each one of them.​

Answer 1

Step-by-step explanation:

Jay wants to buy 4pen and 8notebook

cost of 1pen is Rs.6 and cost of 1notebook is Rs.10

4×6=Rs.24pen

8×10=Rs.80notebook

Ram wants to buy 5pen and 12notebook

cost of 1pen is Rs.6 and cost of 1notebook is Rs.10

5×6=Rs.30pen

12×10=Rs.120notebook

Answer 2

JAY  required Rs 104  & RAM required Rs 150

Step-by-step explanation:

                 Pens       Note Book                                 Price

JAY            4                  8                     Pen                     6

RAM           5                  12                   Note book          10

$\left[\begin{array}{ccc}4&8\\5&12\end{array}\right] \left[\begin{array}{ccc}6\\10\end{array}\right] = \left[\begin{array}{ccc}104\\150\end{array}\right]$

                           Amount

Jay            4* 6 + 8 * 10          = 104

Ram          5 *6  + 12 * 10       = 150

JAY  required Rs 104  & RAM required Rs 150

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