Solution - Inverse of a Matrix by Elementary Operations



      Forgot password?

View all notifications
Books Shortlist
Your shortlist is empty


A shopkeeper has 3 varieties of pens 'A', 'B' and 'C'. Meenu purchased 1 pen of each variety for a total of Rs 21. Jeevan purchased 4 pens of 'A' variety 3 pens of 'B' variety and 2 pens of 'C' variety for Rs 60. While Shikha purchased 6 pens of 'A' variety, 2 pens of 'B' variety and 3 pens of 'C' variety for Rs 70. Using matrix method, find cost of each variety of pen.


You need to to view the solution
Is there an error in this question or solution?

Similar questions VIEW ALL


If A = `[[1,-2,3],[0,-1,4],[-2,2,1]]` ,find (A')-1

view solution

A typist charges Rs. 145 for typing 10 English and 3 Hindi pages, while charges for typing 3 English and 10 Hindi pages are Rs. 180. Using matrices, find the charges of typing one English and one Hindi page separately. However typist charged only Rs. 2 per page from a poor student Shyam for 5 Hindi pages. How much less was charged from this poor boy? Which values are reflected in this problem?

view solution

Reference Material

Solution for concept: Inverse of a Matrix by Elementary Operations. For the courses 12th CBSE (Arts), 12th CBSE (Commerce), 12th CBSE (Science), PUC Karnataka Science