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There are threee families A , B and C . ...

There are threee families A , B and C . The number of men , women and children in these families are as under :

Daily expenses of men , women and children are Rs. 200 , Rs. 150 and Rs. 200 , repectively . Only men and women earn and children do not . Using matrix multiplication , calculate the daily expenses of each family .

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The correct Answer is:
C= Rs. 2300
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There are two families A and B. There are 4 men, 6 women and 2 children in family A and 2 men, 2 women and 4 children in family B. The recommended daily amount of calories is 2400 for men, 1900 for women and 1800 for children, and 45 g of proteins for men, 55 g for women and 33 g for children. Represent the above information by matrices. Using matrices multiplication, calculate the total requirement of calories and proteins for each of the 2 families.

There are two families A and B . There are 4 men , 6 women and 2 children in family A and 2 men , 2 women and 4 children in family B. The recommended daily amount of calories is 2400 for men , 1900 for women and 1800 for children , and 45 g of proteins for men , 55 g for women and 33 g for children .Represent the above information by matrices .Using matrices multiplication , calculate the total requirement of calories and proteins for each of the 2 families .

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ARIHANT PUBLICATION-MATRICES -QUESTIONS FPR PRACTICE Part II (Multiplication of Matrices (Matrix Multiplecation) Short Answer Type Questions
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  2. If A and B are square matrices of same order, then show by means of an...

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  3. Find the product [{:(1,2,3),(2,3,4):}][{:(1,-2),(-2,3):}]

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  4. If A=[{:(-1,3,5),(1,-3,-5),(-1,3,5):}], then find A^(3)-A^(2).

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  5. If A=[{:(3,1),(-1,2):}] then prove that A^(2)-5A+7I=O

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  6. Find x, so that [{:(1,x,1):}][{:(1,3,2),(0,5,1),(0,3,2):}][{:(1),(1),(...

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  7. Find the matrix A such that A[{:(1,2,3),(4,5,6):}]=[{:(-7,-8,-9),(2,4...

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  8. If the matrix A is such that [{:(1,-1),(2,3):}]A=[{:(-4,1),(7,7):}] th...

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  9. Let A=[{:(2,-1),(3,4):}],B=[{:(5,2),(7,4):}]andC=[{:(2,5),(3,8):}]. F...

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  10. If f(x)=[{:(cosx,-sinx,0),(sinx,cosx,0),(0,0,1):}], then show that ...

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  11. If A= [{:(1,-1),(2,-1):}],B=[{:(a,1),(b,-1):}]and(A+B)^(2)=A^(2)+B^(2)...

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  12. If A=[[0,-tan(alpha/2)],[tan(alpha/2),0]] show that (I+A) =(I-A)[[c...

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  13. To promote the making of toilets for women , an organisation tried to ...

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  14. There are threee families A , B and C . The number of men , women and ...

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  15. In a parliament election , a political party hired a public relation...

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  16. There are two families A and B . There are 4 men , 6 women and 2 child...

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