3. A certain book shop has 10 dozen Chemistry books, 8 dozen Physics books, 10 dozen Economics books.
Their selling prices are Rs.80, Rs.60 and Rs.40 each respectively. Using matrix algebra, find the total
value of the books in the shop.
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Answer:
the total value of book in the shop=Rs 20,160
Step-by-step explanation:
no. of chemistry book = 10 dozen =10x12=120
no. of physics book= 8x12=96
no. of economics book= 10x12=120
let matrix A denote no. of book per subject
chemistry. physics. economics
A=[ 120. 96. 120 ]
let matrix B denote selling price of book per subject
B=[ 80 60 40 ]
now total value of book in the shop=no of book X selling price
=AB
=20160
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