Direction: Study the following information to answer the questions.

In hotel B, the ratio of female customers on Tuesday and Friday was 2 : 3. If on Friday, female customers constituted 50% of the number of customers (male + female), then what was the number of customers (male + female) in hotel B on Friday?

A Shopkeeper marks his goods 20 % above its cost price and gives 15 % discount on the marked price. Find the gain?

What sum will amount to ₹ 7000 in 5 years at $$3{1\over3}\%$$ simple interest ? 

A trader allows a trade of 20% and a cash discount of $$6{1\over 4}\%$$% on the marked price of the goods and gets a net gain of 20% of the cost. By how much above the cost should the goods be marked for the sale? 

If the circumradius of an equilateral triangle be 10 cm, then the measure of its in-radius is

The value of (tan²A+ cot²A-2)- sec²A cosec² A is:

The diagonal of a right angle isosceles triangle is 5 cm. Its area will be

If Anju is 30% more efficient than Bitt, then how much time will they take, working together, to complete a job which Anju alone could have done in 23 days?