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 :
B = `[(6650, 7055, 8905),(7000, 7500, 10200)][("Suresh"), ("Ganesh")]`
If both book shops get 10% profit in the month of August 2017, find the profit for each book seller in each subject in that month.

Answer 1

Both book shops got 10% profit in the month of August 2017.
For Suresh :
Profit for Physics books = `(6650 xx 10)/(100)` = ₹ 665

Profit for Chemistry books = `(7055 xx 10)/(100)` = ₹ 705.50

Profit for Mathematics books = `(8905 xx 10)/(100)` = ₹ 890.50
For Ganesh :
Profit for Physics books = `(7000 xx 10)/(100)` = ₹ 700

Profit for Chemistry books = `(7500 xx 10)/(100)` = ₹ 750

Profit for Mathematics books = `(10200 xx 10)/(100)` = ₹ 1020