Using the same sales matrices $A$ (July) and $B$ (August) as in part (i): if both book shops got 10% profit in the month of August 2017, find the profit for each book seller in each subject in that month.

Using the same sales matrices A (July) and B (August) as in part (i): if both book shops got 10% profit in the

Exercise 4.5 · Q121

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Given August sales $B = \begin{bmatrix} 6650 & 7055 & 8905 \\ 7000 & 7500 & 10200 \end{bmatrix}$ (Row 1 = Suresh, Row 2 = Ganesh; columns = Physics, Chemistry, Mathematics). A 10% profit means each entry is multiplied by $\frac{10}{100}=0.1$ :

Suresh: Physics $0.1\times6650=665$ ; Chemistry $0.1\times7055=705.5$ ; Mathematics $0.1\times8905=890.5$

Ganesh: Physics $0.1\times7000=700$ ; Chemistry $0.1\times7500=750$ ; Mathematics $0.1\times10200=1020$ …

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Q.Using the same sales matrices $A$ (July) and $B$ (August) as in part (i): if both book shops got 10% profit in the month of August 2017, find the profit for each book seller in each subject in that month.

Concept understanding — Operations on Matrices

Q.Using the same sales matrices AAA (July) and BBB (August) as in part (i): if both book shops got 10% profit in the month of August 2017, find the profit for each book seller in each subject in that month.

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Q.Using the same sales matrices $A$ (July) and $B$ (August) as in part (i): if both book shops got 10% profit in the month of August 2017, find the profit for each book seller in each subject in that month.

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