The retail price of a pen is 40 taka. As if got discount of 20% over the retail price and he eventually saved taka 240 on his total purchase of the pens. How many pens did he buy?
সঠিক উত্তর: Option D
40 এর 20%= 8 টাকা
Tk. 8 save in 1 pen
Tk. 240 save in 240/8=30 pen