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A shopkeeper has 3 varieties of pens ' ...

A shopkeeper has 3 varieties of pens `' A^(prime),\ ``' B '` and `' C '`. Meenu purchased 1 pen of each variety for a total of Rs 21. Jeen purchased 4 pens of `' A '` variety, 3 pens of `' B '` variety and 2 pens of `' C '` ariety 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 the cost of each pen.

Answer

Step by step text solution for A shopkeeper has 3 varieties of pens ' A^(prime),\ ' B ' and ' C '. Meenu purchased 1 pen of each variety for a total of Rs 21. Jeen purchased 4 pens of ' A ' variety, 3 pens of ' B ' variety and 2 pens of ' C ' ariety 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 the cost of each pen. by MATHS experts to help you in doubts & scoring excellent marks in Class 12 exams.

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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.

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Knowledge Check

  • If cost of 12 pens is Rs84. then what is the cost of 10 such pens ?

    A
    ? 90
    B
    ? 72
    C
    ? 65
    D
    ?70

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