What is the total number of mobile phones Sold of company B during August and September together?

Answer: Option A

Mobile phones of B sold during August
$$\begin{array}{rl}& =45000\times \frac{22}{100}\times \frac{5}{9}\\ & =5500\end{array}$$
Mobile phones of B sold during September
$$\begin{array}{rl}& =45000\times \frac{25}{100}\times \frac{2}{5}\\ & =4500\end{array}$$
∴ Required number of phones sold
  = 5500 + 4500
  = 10000