Bank Math Master১টি পরীক্ষায় এসেছেপ্রশ্ন ১৩Find the rate of discount being given on a shirt whose selling price is Tk. 420 after deducting a discount of Tk. 80 on its marked price.ক12%খ8%গ16%ঘ10%উত্তর দেখুন