Study the following graph carefully to answer the questions given below.
What is the average number of Units of laptop sold by all the Companies together?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 
Sales of all companies are 650,300,150
average = sum of all Sales/number of companies
average = 650 + 300 + 150/3
average = 1100/3 = 366 (2/3)