Question

Cost of a dozen pens is Rs. $$180$$ and cost of $$8$$ ball pens is Rs. $$56$$. Find the ratio of the cost of a pen to the cost of a ball pen.

Answer 1

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$$=15/7$$.