Question

a man buy 8 dozen mangoes, 10 dozen apples and 4 dozen bananas. mango cost rs 18 per dozen, apples rs 9 per dozen and bananas rs.6 per dozen. respect the quantities bought by a row matrix and the prices by a column matrix and obtain the total cost​

Answer 1

Let A the row matrix representing the quantities bought, then A=[

8

10

4

] is a 1×3 matrix.

Let B be the column matrix representing the cost of mangoes,apples and bananas per dozen the B=

18

9

6

is a 3 x 1 matrix

The total cost is given by the product AB

and AB=[

8

10

4

18

9

6

=[144+90+24]=[258]

Hence, the total cost is Rs 258

Answer 2

Step-by-step explanation:

let a the row matrix representing the quantities brought then a =[8 10 4 ] is a 1×3 matrix . let b be the column matrix representing the cost of mangoes , apples .[144+90+24 ] = 258

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