In a survey, 60 % of 200 students prefer online classes, and 25 % of the remaining prefer hybrid classes. How many students prefer neither?
Which letter replaces the question mark? A, D, G, J, M, ?
In a certain code language, `EARTH' is written as `JFWYM'. How is `WORLD' written in that code?
A shopkeeper sells an item at a 20 % discount on the marked price and still makes a 25 % profit. If the marked price is 500 rupees, what is the cost price of the item?
A shopkeeper marks an item 40 % above its cost price. He offers two successive discounts of 10 % and 20 % on the marked price. If the selling price is 504 rupees, what is the cost price of the item?