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Inverse Proportion

If 8 pencils ...

Question

If 8 pencils cost ₹24, a dozen of them will cost ___.

A

₹30

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B

₹36

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C

₹40

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D

₹42

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Solution

The correct option is B
₹36

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Q. 3 persons A,B,C go to stationary shop and If person A buying 10 dozen notebooks and 4 dozen pen and 5 dozen pencil and person B purchase 8 dozen notebook, 6 dozen pens and 7 dozen pencil, and person C purchase 10 dozen notebook, 5 dozen pen and 11 dozen pencil. A note book cost Rs.3, A pen cost Rs.2 and pencil cost Rs.1, by using matrix multiplication to calculate each individual will.

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Q. If 9 pens cost ₹72, a dozen of them will cost _________.

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