A shopkeeper sells the rubber bands at 5 for a rupee gaining 40%. How many did he buy for a rupee? Share with your friends Share 0 Atul Shaw answered this Solution:SP for 5 bands=Rs. 1SP of 1 band=Rs. 15=Rs. 0.2Still profit%=40%Profit%=SP-CPCP×100⇒40100=0.2CP-1⇒1+40100=0.2CP⇒1.4=0.2CP⇒CP=0.21.4=Rs. 17So, CP of 1 pen=Rs. 17So, for Rs. 1, he can buy 7 pens 0 View Full Answer