Study the following table carefully and answer the questions given below.

What was approximate percentage increase in the number of students in Commerce discipline from 2003 to 2004?

Direction: Percentage of different types of employees in a company in two consecutive years.

In 1997 the total number of which of the following types of pairs of employees was approximately equal to the employees in 1998? 

Directions :- Refer the graph and answer the given questions.
 The following line graph shows the number of products sold by company A and B during six years.

What is the difference between the total number of products sold by B in 2011, 2012 and 2016 together and the total number of products sold by A in 2011, 2012 and 2013 together?

If (a-b)=-3 , (b-c)=5 and (c-a)=-2, then the value of $$ {a^{3}+b^{3}+c^{3}-3abc\over a+b+c}$$.

The length of the diagonal of a square is 'a' cm. Which of the following represents the area of the square (in sq. cm)? 

A man bought 20 dozen eggs for Rs. 720. What should be the selling price of each egg if he wants to make a profit of 20 %? 

A is twice as efficient as B in writing novels. Together they can complete the task of writing a novel in 24 days. In how many days can A write the novel alone?

If Cost price of an article is Rs.220 and profit is 20 %, then what will be the selling price of the article?