Question

If the cost of 18 pens is Rs. 234, a dozen pen will cost *

1 point

Rs 144

Rs 156

Rs 192

Rs 180

​

Answer 1

Step-by-step explanation:

cost of 1 pen = 234/18

= 13

Therefore, dozen pen means 12 pens

= 12 × 13

= 156

Answer 2

Answer:

$\implies \sf \: cost \: of \: 18 \: pens \: =rs \: 234 \\ \\ \therefore \sf \: cost \: of \: one \: pen \: = \frac{cost \: of \: pens}{total \: pens} \\ \implies \sf \: \cancel \frac{234}{18} = rs \: 13 \\ \\ \bullet \large\sf \green {1 \: dozen \: = \: 12 \: units} \\ \\ \huge \sf \: so \: \\ \implies \sf \: dozen \: pen \: will \: cost = 12 pens \times 13 \\ \implies \large \sf \red{rs \: 156} \\ \\ \huge \sf \implies{\boxed{\boxed{\underline{\underline{\blue{rs \: 156}}}}}}$