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25. 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, barnafnen

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Q1

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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Q2

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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Q3

A shopkeeper has

3

varieties of pens

A, B

and

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. Meenu purchased

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pens of

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variety and

2

pens of

C

variety for Rs.

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pens of

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pens of

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Q4

Spending

R s .422

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, find the total number of pens of varieties

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Q5

A person wants to buy one fountain pen, one ball pen and one pencil from a stationery shop. If there are 10 fountain pen varieties, 12 ball pen varieties and 5 pencil varieties, in how many ways can he select these articles?

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