Question

1 dozen pens cost rupees 21 find the cost of one score pencil

Answer 1

$\mathsf{1 \: dozen \: or \: 12 \: pens = ₹ 21}$

$\mathsf{1 pen = \frac{21}{12}}$

$=> ₹ 1.75$

$\mathsf{\therefore \: ,Cost \: of \: 1 \: pen \: is \: Rs. \: 1.75}$

Hope it helps friend !

Answer 2

Cost of 1 dozen pen (12 pens) = Rs.21
Cost of 1 pen = 21/12 = Rs 1.75