Question

There are two book shops own by Suresh and Ganesh. Their sales (in Rupees) for books in three subject - Physics, Chemistry and Mathematics for two months, July and August 2017 are given by two matrices A and B.

July sales (in Rupees), Physics Chemistry Mathematics

A = `[(5600, 6750, 8500),(6650, 7055, 8905)][("Suresh"), ("Ganesh")]`

August Sales (in Rupees) Physics Chemistry Mathematics

B = `[(6650, 7055, 8905),(7000, 7500, 10200)][("Suresh"), ("Ganesh")]`

Find the increase in sales in Rupees from July to August 2017.

Answer 1

Increase sales rupees from July to August 2017.

For Suresh:

Increase in sales for Physics books

= 6650 – 5600 = ₹ 1050

Increase in sales for Chemistry books

= 7055 – 6750 = ₹ 305
Increase in sales for Mathematics books

= 8905 – 8500 = ₹ 405

For Ganesh:

Increase in sales for Physics books

= 7000 – 6650 = ₹ 350

Increase in sales for Chemistry books

= 7500 – 7055 = ₹ 445

Increase in sales for Mathematics books

= 10200 – 8905 = ₹ 1295