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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.

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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. Jeen 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 the cost of each pen.

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