Question Detail
The bar graph provided below gives the sales of books (in thousand numbers) from six branches of a publishing company during two consecutive years 200 and 2001. Answer the questions based on the graph.
What percent of the average sales of branches B1, B2 and B3 in 2001 is the average sales of the branches B1, B3 and B6 in 2000 ?
- 83.5%
- 87.5%
- 88.5%
- 89.5%
Answer: Option B
Explanation:
Average sales (in thousand numbers) of branches B1, B3 and B6 in 2000 are
\begin{aligned}
=\frac{1}{3}*(80+95+70) \\
= \frac{245}{3} \\
\end{aligned}
Average sales (in thousand numbers) of branches B1, B2 and B3 in 2001 are
\begin{aligned}
=\frac{1}{3}*(105+65+100) \\
= \frac{280}{3} \\
\text{Required Percentage =}\left( \frac{\frac{245}{3}}{\frac{280}{3}}*100 \right)\% \\
= \left( \frac{245}{280}*100 \right) \% \\
= 87.5 \%
\end{aligned}
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