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The cost of 4 kg onion, 3 kg wheat and 2...

The cost of 4 kg onion, 3 kg wheat and 2 kg rice is Rs 60. The cost of 2 kg onion, 4 kg wheat and 6 kg rice is Rs 90. The cost of 6 kg onion, 2 kg wheat and 3 kg rice is Rs 70. Find cost of each item per kg by matrix method.

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The cost of 4 kg onion, 3 kg wheat and 2 kg rice is Rs 60. That: cost of 2 kg onion, 4 kg wheat and 6 kg rice is Rs 90. The cost of 6 kg onion, 2 kg wheat and 3 kg rice is Rs 70. Find the cost of each item per kg. by using matrix method.

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MODERN PUBLICATION-DETERMINANTS-EXERCISE
  1. The sum of three numbers is 6. If we multiply third number by 3 and ad...

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  2. The sum of three numbers-is 6. If we multiply the third number by 2 an...

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  3. The cost of 4 kg onion, 3 kg wheat and 2 kg rice is Rs 60. The cost of...

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  4. Find area of the triangle with vertices at the point given in the fol...

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  5. Show that Delta={:|(x,p,q),(p,x,q),(q,q,x)| = (x-p)(x^2+px-2q^2)

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  6. If Delta= {:|(0,b-a,c-a),(a-b,0,c-b),(a-c,b-c,0)|, then show that Delt...

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  7. If x = -4 is a root of Delta= {:|(x,2,3),(1,x,1),(3,2,x)|=0, then find...

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  8. Show that the points (a+5,a-4),(a-1,a+3) and (a,a) do not lie on a str...

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  9. If A=[(3,1),(7,5)] , find x and y so that A^2 + xI-yA=0. Hence find A^...

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  10. Without expanding, show that the following determinants vanish: {:|(...

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  11. Prove that: {:|(a+b+nc,na-a,nb-b),(nc-c,b+c+na,nb-b),(nc-c,na-a,c+a+...

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  12. Prove that triangle = |[a+bx,c+dx,p+qx],[ax+b,cx+d,px+q],[u,v,w]| = (1...

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  13. If |[[x,2],[18,x]]|=|[[6,2],[18,6]]|, then x is equal to:

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  14. Let A be a square matrix of order 3 xx 3. Then I kA I is equal to :

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  15. Which of the following is correct

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  16. If area of triangle is 35 sq. units with vertices (2,-6), (5, 4) and (...

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  17. Let A be a non-singular matrix of order 3 xx 3. Then I adj. A I is equ...

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  18. Select the Correct Option If A is an invertible matrix of order 2, the...

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  19. If a, b, c, are in A.P, then the determinant |[x+2,x+3,x+2a],[x+3,x+4,...

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  20. Let A = [[1,sintheta,1],[-sintheta,1,sintheta],[-1,-sintheta,1]], wher...

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