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5. Algebra of Matrices
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Q1 of 307 Page 5

Compute the indicated products:





Hence,



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21

In a certain city there are 30 colleges. Each college has 15 peons, 6 clerks, 1 typist and 1 section officer. Express the given information as a column matrix. Using scalar multiplication, find the total number of posts of each kind in all the colleges.

22

The monthly incomes of Aryan and Babban are in the ration 3: 4 and their monthly expenditures are in the ratio 5: 7. If each saves 15000 per month, find their monthly incomes using the matrix method. This problem reflects which value?

1

Compute the indicated products:

1

Compute the indicated products:

Questions · 307
5. Algebra of Matrices
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