Question

ritika bought a dozen pens for rupee 144 find the coast of 15 such pens how many pens can be bought for rupee 84 answer​

Answer 1

Answer:

ANSWER

Cost of a dozen pens=Rs. 180

Cost of 1 pen 12=180/12=Rs. 15

Cost of 8 ball pens=Rs. 56

Cost of a ball pen=56/8=Rs. 7

Required ratio=15/7.

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Answer 2

Answer:

$cost \: of \: 12 \: pens = 144 \\ cost \: of \: 1 \: pen = \frac{144}{12} \\ = > 12 \\ cost \: of \: 15 \: such \: pens \: = 12 \times 15 \\ = > 180 \\ pens \: come \: in \: rupees \: 84 = \frac{84}{12} \\ = > 8$