Study the given graph and answer the question that follows.
The total number of female employees of the company in offices B, D and E is what percentage less than the total number of male employees in offices A, B, C and E ( correct to one decimal place)?
The ratio of copper and zinc in alloy A is 5:7 and that in alloy B is 4:5. A and B are taken in the ratio of 1:2 and mixed to form a new alloy C. What part of C is copper?
\(\frac{47}{108}\)
\(\frac{5}{12}\)
\(\frac{4}{9}\)
\(\frac{61}{108}\)