First you need to divide ₹134 by 12 to find the cost of each pen.
[tex] \frac{134}{12} = \frac{67}{6} [/tex]
Multiply the cost of each pen by 5 to find the cost of 5 pens.
[tex]( \frac{67}{6} ) \times 5 = \frac{335}{6} [/tex]
≈ ₹55.8 (correct to 1 decimal place)