Question

There are two book shops owned 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] First Row Suresh/ Second Row Ganesh
August sales (in Rupees), Physics Chemistry
Mathematics B=
[6650 7055 8500 ]
[7000 7500 10200 ]
First Row Suresh/Second Row Ganesh then,
(i) Find the increase in sales in Rupees from
July to August 2017.
(ii) 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.​

Answer 1

Answer:

Step-by-step explanation:

Total Sale in July

= 5600 + 6750 + 8500 + 6650 + 7055 + 8905

= 43460

Total Sale in August

= 6650 + 7055 + 8500 + 7000 + 7500 + 10200

= 46905

increase in sale = 46905 - 43460 =  Rs 3445

If Cost Price = 100C

Profit 10% = 10C

Selling Price = 110C

=> Profit/Selling  = 10C/110C

=> Profit = Selling /11

                              Physics     Chemistry  Mathemnatics

August Profit =      6650/11     7055/11      8905/11                 Suresh

                              7000/11      7500/11     10200/11               Ganesh