A school purchased 8 dozen mathematics books 7 dozen physics books 10 dozen chemistry books the prices are Rs.50, Rs.40, and Rs.60 per book respectively . Find the total amount that the book seller will receive from school authority using matrix multiplication?
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Rs. 20,160
No. of chemistry books =10 dozen =10×12=120
No. of physics books =8 dozen =8×12=96
No. of Economics books =10 dozen =10×12=120
Now, S.P of 1 chemistry book = Rs. 80
S.P of 1 Physics book = Rs. 60
S.P. of 1 economic book = Rs. 40
Total S.P. =[12096120]⎣⎢⎢⎡806040⎦⎥⎥⎤
=120×80+96×60+120×40
=9600+5760+4800
= Rs. 20160
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