Correct Answer - Option 1 : Rs. 600

**Given:**

A cycle seller gives 10% discount on marked retail and still earns 26% profit.

The marked retail price of the cycle is Rs. 840.

**Concept used:**

Selling price = Marked price × (100 - discount%)/100

Selling price = cost price × ( 100 - profit%)/100)

**Calculations:**

Marked price. = 840

Selling price = 840 × (100-10)/100

⇒ 756

Now we know that we get a profit of 26% by selling this article, so

Cost price (100 + 26)/100) = 756

⇒ Cost price (126/100) = 756

⇒ Cost price = 600

**∴ The correct choice will be option 1.**