Study the following graph carefully to answer the questions:
What is the average per cent increase in profit of Company B in the year 2007 and 2009 together ?
% increase in profit of Company B in the year 2007 = 45
% increase in profit of Company B in the year 2009 = 50
=> Required average = $$\frac{45 + 50}{2} = \frac{95}{2}$$
= 47.5
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