In how many years, the revenue of the firm is less than the average revenue for these 8 years ?

Average Revenue:

$=$ Rs. $left(frac{egin{array}{l}300+260+350+320+ \ 250+340+240+280end{array}}{8} ight)$ crores

$=$ Rs. $left(frac{2340}{8} ight)$ crores $=$ Rs. $292.5$ crores

Required years ⇒ 2010, 2013, 2015, 2016