একটি দোকান থেকে y টাকা দিয়ে 16টি কলম কেনা যায়। কলমের মূল্য যদি 20% কমানো হয় তবে z টাকা দিয়ে কয়টি কলম কেনা যাবে?

A trader paid Tk. 300 for a shipment of x identical pens. The trader gave two pens free of cost and sold each...

If the average of 5 positive integers is 40 and the difference between the largest and the smallest of these 5...

A customer came to a shop and asked the shop manager to give a 20% discount on the listed price of a pen. More...

The fee for a course was increased by x percent from that of the previous year. Arif, a meritorious student, g...

A box contains 200 pens of which 25% are red and the rest are black. You sold a certain number of pens, of whi...

In a college, the ratio of foreign to local students is 3:7. If three-fourths of the local students are female...